[GuestStar2004]

during the time First class was released singer felt they could do sequels in the 70s and 80s and vaughn said something about keeping it in the 60s during JFK assassination, so id say no plans had been made at that time

and DOFP could have been done without the prequel, they could just have said it 20 years after the last stand with older versions of rogue,iceman wolverine ect ect in a dark future and kitty has to go back in time fix it