Seems like everyone wants to get into the new Star Wars film. You have Ewan McGregor wanting to Reprise Obi-Wan Kenobi Role, and Samuel L. Jackson just wants a role in the new film. Be it as Mace living or die, or whatever from what I read from him. lol
Might be cool to see Mace Windu back, seeing how we really don't know what happened to him, when he was shot out the window.
As quoted by Jackson: "I can come back as one-armed or a one-handed Jedi that's still around that didn't actually die," he said. "I could do that or be a ghost hologram. I don't care!"
No reason why Mace couldn't come back (although he'd be pretty old...) his departure from RotS shouldn't've been fatal, afterall, he only lost a hand, and was a considerable height up in the senate building... No reason he couldn't've come too during his fall and then used his Jedi training to lessen his fall/crashland in a speeder Leeloo-style