Rhikter said:
Maul-Grievous is a damn good idea. If they had used that as his backstory in RotS it would have added a hell of a lot more depth to his character. For starters it would give Darth Maul some of a connection to Darth Vader. Not only would he be a mechanical monster with asthma, but he also would have been cast aside in favor of a more powerful apprentice.

I just don't see it. Greivous is a general, a sneaky tactician who hits and runs. Maul is a silent killer. I don't see why Maul would somehow suddenly become a leader because he's cut in half.

Also, I just don't like the idea of Maul living. He was in the movie, looked cool, killed a Jedi then died. It's not that he's the single most compelling character of all time who was taken from us too soon before we breached his emotional depths.