This is just one of the scenarios that would do what I wanted: allow us to gameplay with Auron again, and have a change of scenery. Another idea is scratch the aliens harvesting idea and Auron just calls Tidus for help with the Farplane (Seymour wants to come back ? or some similar danger)

But as someone pointed out before, Seymour coming back or yet another new villain with no ties to the past story would look a bit artificial..

The alien harvesting story is a riff on Anne McCaffrey's Freedom Ship stories, which rips it from HG Wells War of the Worlds. A classical Sci-Fi plot. A good writer (not me!) good make a great plot out of it

I'm not sure if pre-alien Spira had spaceships but it seems to me the Al Bhed would be the descendants of space pilots and space crews if Spira ever had them. It would make a lot of sense: Not falling for Yevon's lies, being fascinated for technology, a different language, feeling at home in diving suits (space suits). Plus it would make for cool Al Bhed scenes!

What do you guys think ? How would you do it ?