Hello Justin! I am new here too! You make some good points but I have some questions. Speaking of nebuchadnezzers dream, did you mean Daniel? Or did king David write of him somewhere in the Psalms, I can't recall.
You said that after the rapture happens that the Holy Spirit would leave the earth. If that is true, then how could anyone else come to know G0d? Doesn't John 6 say that no one can come to know Jesus except the Father draw him? Isnt' that how he draws one, by His Holy Spirit?
You said few will become Christians after the rapture, then where do all those that are hiding under the throne awaiting for their blood to be avenged come from and who are told to wait for their fellow servants that should be killed as they were come from?
As far as what religion, I really don't think it will be a religion, it will be the underlying spirit that has been since day one, that of opposition to G0d and that is the spirit behind everything that is not of G0d, all religions in the world from ancient to the ones created today are all worshipping the same god, and that is satan. There aren't many gods, there is only one real G0d in heaven and one who wants to be like him and he has tried to decieve mankind into believing his is the real thing for millinia.