The OP might even say if you survive the tribulation you end up with 1000 years of bliss then the Lake of Fire awaits? I do not know but, Thank God, God knows.
Not everyone during the Millennial Reign will turn against Christ.
It will be a choice, just as it is now. But those people will have absolutely no excuse then because they have lived during a time when there was no curse on the earth, and every need man can have is provided for.
People will have to choose to rebel against Christ at that time, just like now. And not everyone will.