captainsolo said:

A spin off with an amnesiac one armed Mace Windu who is now a mercenary would be pretty good, especially since there would actually be a story there. But then they would likely do something stupid like have him change his name to Calrissian and have a child.

I actually wouldn't mind if they made a spinoff with a clone of Mace Windu. Palpatine recovered his body after his fall and performed experiments with his DNA, yielding an insane clone, a sort of Jorus C'baoth. I think Samuel L. Jackson could play it well.