Even some who think they are Christians don't make it into heaven, and we all come face to face with Jesus Christ:
Matthew 7:21-23
New King James Version
I Never Knew You
21 “Not everyone who says to Me, ‘Lord, Lord,’ shall enter the kingdom of heaven, but he who does the will of My Father in heaven. 22 Many will say to Me in that day, ‘Lord, Lord, have we not prophesied in Your name, cast out demons in Your name, and done many wonders in Your name?’ 23 And then I will declare to them, ‘I never knew you; depart from Me, you who practice lawlessness!’
Additionally Satan already tossed into the lake of fire gets company, and his followers are all tossed into the lake of fire, which burns forever and ever. All whose names are not found in the book of life. This is the great white throne judgement:
Rev. 20:11 Then I saw a great white throne and Him who sat upon it, from whose presence earth and heaven fled away, and no place was found for them.
Rev. 20:12 And I saw the dead, the great and the small, standing before the throne, and books were opened; and another book was opened, which is the book of life; and the dead were judged from the things which were written in the books, according to their deeds.
Rev. 20:13 And the sea gave up the dead which were in it, and death and Hades gave up the dead which were in them; and they were judged, every one of them according to their deeds.
Rev. 20:14 Then death and Hades were thrown into the lake of fire. This is the second death, the lake of fire.
Rev. 20:15 And if anyone’s name was not found written in the book of life, he was thrown into the lake of fire.