I actually had a theory similar to this a LONG time ago, just after Shadow Puppets came out. I even emailed OSC about it, I think I still have the response from Kathryn... Something about OSC never and will never read an email talking about possible storylines.I thought of a crazy theory, that Ender's future wife [what's-her-name] is a descendant of Bean? That could be possible.
Personally, thinking that the people living on Lusitania are distant decendants of Bean is a better storyline than putting Bean in a space ship at relativistic speeds and coming out just in time to meet up with the new Ender. Too neat for me.