^^ I think, based on what we've seen from the previous movies, a transition to the brotherhood would be a difficult, if not interesting set up. Not that I'm disagreeing with you, but just the way she has been portrayed in the movies and her character development so far has her, in my eyes, staying with the Xmen and growing there, in X4. Maybe she'd be better in the brotherhood, but she needs something strong to link these two steps together: it would be weird to see her all of a sudden resentful of the Xmen and then just join the brotherhood for X4. However, from X2-X3, there were alot of (mostly uncredible IMO) leaps and bounds in terms of plot and character (non) development, so who knows, it could work. Maybe she's "seduced" into joining the brotherhood, but I think if it were to happen, something should have been hinted at or taken in that direction in X3, so to set things up nicely. I agree about the Kitty/Jubilee type argument, and especially with the type of powers she has, coming close or actually killing someone would be an interesting situation with Rogue. MAybe for X4 she nearly or actually kills someone, or uses her powers on someone out of spite...then has an emotional overhaul and joins the brotherhood knowing that with these recent events, she can no longer consider herself an "XMan" or something. Once again, I wouldn't disagree with the idea of Rogue in the Brotherhood, I just think whoever writes up the storylines would have a lot to tweak, taking up from the mess of X3.