Out of curiosity, did you ever read Left Beyond or The Omega Legacy?
I genuinely cannot say that reading what appears to be fanfic of the Left Behind series is something it has ever occurred to me to do. Why do you ask?
Because it has the same theme. It's a fixfic of sorts :) https://tvtropes.org/pmwiki/pmwiki.php/Fanfic/LeftBeyond
