Re: Should there be a stand alone Mystique film?
If there's a film centered around Mystique, I'd rather it be X-Factor. She led Freedom Force and the second X-Factor (of which she was a member) claimed her as a member.
The rest of the team can be Multiple Man, Rictor, Forge, Polaris, Gambit and Layla Miller and Mystique would be dealing with Valerie Cooper as her superior with Cooper being this military brass type who's frequently at odds with Mystique over how the team is run and has to report directly to the President.
Moreover, X-Factor would go for a tone similar to Peter David's first run on the title. By that I mean almost a full-on comedy. This story needs to be really, really funny with how the characters interact with one another.