When Jesus Christ returns at His glorious appearing, those who are dead and alive in Christ will rise to be with Him forever. The wicked will be destroyed, cut off and consumed by Him. Jesus Christ will descend upon the Mount of Olives (the same place where he ascended up to the skies), and His saints will be with Him. Jesus Christ will reign the whole earth from Mount Zion (spelled Sion in the NT). Here are more details about Mount Zion with scriptures:
From Strong's Concordance:
Mount Sion: a hill of Jerusalem.
Mount Zion: a mountain of Jerusalem (same as Sion).
This is where the Lord shall be.
"Yet have I set my king upon my holy hill of Zion." Psalm 2:6
"The LORD is great in Zion; and he is high above all the people. Exalt the LORD our God, and worship at his holy hill; for the LORD our God is holy." Psalm 99: 2, 9
"When the LORD shall build up Zion, he shall appear in his glory." Psalm 102:16
"Great is the LORD, and greatly to be praised in the city of our God, in the mountain of his holiness. Beautiful for situation, the joy of the whole earth, is mount Zion, on the sides of the north, the city of the great King." Psalm 48:2
"For the LORD hath chosen Zion; he hath desired it for his habitation." Psalm 132:13
"Cry out and shout, thou inhabitant of Zion: for great is the Holy One of Israel in the midst of thee." Isaiah 12:6
"The LORD also shall roar out of Zion, and utter his voice from Jerusalem; and the heavens and the earth shall shake: but the LORD will be the hope of his people, and the strength of the children of Israel. So shall ye know that I am the LORD your God dwelling in Zion, my holy mountain: then shall Jerusalem be holy, and there shall no strangers pass through her any more." Joel 3:16, 17
"Thus saith the LORD; I am returned unto Zion, and will dwell in the midst of Jerusalem: and Jerusalem shall be called a city of truth; and the mountain of the LORD of hosts the holy mountain." Zechariah 8:3
We shall dwell there with Him.
"For God will save Zion, and will build the cities of Judah: that they may dwell there, and have it in possession. The seed also of his servants shall inherit it: and they that love his name shall dwell therein." Psalm 69:35, 36
"They that trust in the LORD shall be as mount Zion, which cannot be removed, but abideth for ever. As the mountains are round about Jerusalem, so the LORD is round about his people from henceforth even for ever." Psalm 125:1, 2
What Zion shall be like!
No more war!
"And it shall come to pass in the last days, that the mountain of the LORD's house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it.
And many people shall go and say, Come ye, and let us go up to the mountain of the LORD, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of the LORD from Jerusalem.
And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more." Isaiah 2: 2, 3, 4
Cloud by day, fire by night, shade from heat, shelter from the rain
"And the LORD will create upon every dwelling place of mount Zion, and upon her assemblies, a cloud and smoke by day, and the shining of a flaming fire by night: for upon all the glory shall be a defence. And there shall be a tabernacle for a shadow in the day time from the heat, and for a place of refuge, and for a covert from storm and from rain." Isaiah 4:5, 6
There will be stunning light from God that puts the moon and stars to shame!
"Then the moon shall be confounded, and the sun ashamed, when the LORD of hosts shall reign in mount Zion, and in Jerusalem, and before his ancients gloriously." Isaiah 24:23
The Lord shall comfort you there!
"For the people shall dwell in Zion at Jerusalem: thou shalt weep no more: he will be very gracious unto thee at the voice of thy cry; when he shall hear it, he will answer thee." Isaiah 30:19
"And the ransomed of the LORD shall return, and come to Zion with songs and everlasting joy upon their heads: they shall obtain joy and gladness, and sorrow and sighing shall flee away." Isaiah 35:10
"For the LORD shall comfort Zion: he will comfort all her waste places; and he will make her wilderness like Eden, and her desert like the garden of the LORD; joy and gladness shall be found therein, thanksgiving, and the voice of melody." Isaiah 51:3
"Therefore the redeemed of the LORD shall return, and come with singing unto Zion; and everlasting joy shall be upon their head: they shall obtain gladness and joy; and sorrow and mourning shall flee away." Isaiah 51:11
"But be ye glad and rejoice for ever in that which I create: for, behold, I create Jerusalem a rejoicing, and her people a joy. And I will rejoice in Jerusalem, and joy in my people: and the voice of weeping shall be no more heard in her, nor the voice of crying." Isaiah 65:25
There shall be healing there!
"Then the eyes of the blind shall be opened, and the ears of the deaf shall be unstopped. Then shall the lame man leap as an hart, and the tongue of the dumb sing: for in the wilderness shall waters break out, and streams in the desert. "Isaiah 35: 5,6
It will be beautiful!
"And it shall come to pass in that day, that the mountains shall drop down new wine, and the hills shall flow with milk, and all the rivers of Judah shall flow with waters, and a fountain shall come forth out of the house of the LORD, and shall water the valley of Shittim." Joel 3: 18
No more fear!
"But they shall sit every man under his vine and under his fig tree; and none shall make them afraid: for the mouth of the LORD of hosts hath spoken it." Micah 4:4
"The remnant of Israel shall not do iniquity, nor speak lies; neither shall a deceitful tongue be found in their mouth: for they shall feed and lie down, and none shall make them afraid." Zephaniah 3:13
"The wolf and the lamb shall feed together, and the lion shall eat straw like the bullock: and dust shall be the serpent's meat. They shall not hurt nor destroy in all my holy mountain, saith the LORD." Isaiah 65:25
There will be one pure language!
"For then will I turn to the people a pure language, that they may all call upon the name of the LORD, to serve him with one consent." Zephaniah 3:9
You will be in the company of Angels!
"But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels." Hebrews 12:22
The Lord shall rejoice over you!
"The LORD thy God in the midst of thee is mighty; he will save, he will rejoice over thee with joy; he will rest in his love, he will joy over thee with singing." Zephaniah 3:17
We will have the Father's name on our foreheads!
"And I looked, and, lo, a Lamb stood on the mount Sion, and with him an hundred forty and four thousand, having his Father's name written in their foreheads." Revelation 14:1
We will have our own houses and vineyards!
"And they shall build houses, and inhabit them; and they shall plant vineyards, and eat the fruit of them. They shall not build, and another inhabit; they shall not plant, and another eat: for as the days of a tree are the days of my people, and mine elect shall long enjoy the work of their hands." Isaiah 65:21, 22
He shall speak to us and answer us even before we call!
"And it shall come to pass, that before they call, I will answer; and while they are yet speaking, I will hear." Isaiah 65:24
After the millennial reign (1,000 years with Jesus on Earth), and the great white throne judgment which takes place after Satan is loosed to deceive the earth one last time AKA Gog and Magog), it will be complete. There will be a new heaven and new earth. There will be a New Jerusalem that descends out of Heaven down to the new earth as a gift for the bridegroom (Jesus) and the bride (us). It will be a brilliant design with streets made of gold, walls made of precious jewels, and the lamb will be the light thereof!
There will be an article about the new heaven/earth/Jerusalem soon!
But when Jesus appears, we shall always be with Him! He shall reign over us! We as His children are eagerly awaiting the return of our King! We are pilgrims on this Earth awaiting our heavenly kingdom for it's arrival! Such glorious things are awaiting us on Zion! We are the daughters of Zion, and how glorious will the Lamb's kingdom be when He comes to rescue us from our enemies!
Let us rejoice in anticipating these things to come!
And feel free to research more about Zion! There are thousands of verses about Zion/Sion, holy hill, holy mountain, city of God, etc!