Originally Posted by marvelrobbins
Days of future Past should be viewed not as sequel to First Class but sequel to most X-men films..
I think it should be viewed as a sequel to X-Men 3 and X-Men: First Class. Simply because they will have at least 5 characters from X3 and XFC. I also think DOFP is set after X3 (the future timeline) and after First Class (the past timeline).