Originally Posted by M-2
Well if we look at the comics we do know that Mystique and Azazel got togehter, since there son is Nightcrawler. We all saw how badass Azazel is, so essentially he could act as her protector/trainer but they soon find themselves falling inlove
(the Morantic ish) or Mystique could just be using him, kind of the first real sign of her losing her innocence and becoming corrupt.
But maybe Mystique's development, doesn't develop at the rate Magneto was hoping for. So they take her to Sinister to to accelerate the process. But Mister Sinister has his own plans.
I think something like this could work, as you can include the Marauders (Gambit, Sabretooth, Sunfire, Lady Mastermind) as Sinisters own hired assassins. Mystique would join this crew
So essentially the Brotherhood of Mutants could be seen as the protagonist alongside the X-Men as they face off against Sinister and his Marauders.
And if they play the story right, they could even spin-off the Marauders into its own film before they bring it back to the FC franchise, where Gambit and Sunfire choose to go with the X-Men while Mystique and Sabretooth join the Brotherhood. Or something like that.
In principle, that sounds fine, although the movies tend to be more thematic, story-driven and cinematic, and less soapy. But those are good starting points for possible plot points to get into a film. It's about time we saw Sinister, and reintroducing Gambit and Sabretooth and bringing in Sunfire, are all good things.