User blog comment:ADour/The MARVEL UNIVERSE is ENDING!/@comment-8284722-20150122001914/@comment-26247330-20150327201123

I think it goes like this: a super hero from earth 616 (i.e spiderman) will get pulled into battle world. After the events of battleworld, "a new world will emerge from its ashes" and the superhero will live there. the superhero's old home (earth 616) will have been destroyed. but only certain superheroes will be from earth 616. If the most popular version of a character is from earth 1610 then that version is most likely going to be the one that survives for the "new earth". So yes, their histories won't change.