Originally Posted by The Infernal
I'm all for having Rogue return, but I don't think you need to explain her having her powers back. X3 already left enough of a hint that the cure wasn't final, plus having McKellen back as Magneto would likely confirm that also.
Not a lot of people are gonna remember that Magneto moved the Chess piece at the end of X3. They have to explain if Rogue's power came back or else the people who saw X3 would question that.