Originally Posted by The Guard
They can go anywhere they want after DAYS OF FUTURE PAST, but odds are it will involve Sinister and Apocalypse in some fashion. They're going to need to be able to compete with the likes of Thanos and Darkseid soon enough.
Yes, definitely. And the casual viewers need to see villains that they haven't seen before in a X-Men movies. For the first four X-Men movies, the only major villains that we got were Magneto and Stryker. Mr. Sinister would work well with the First Class cast especially if they introduced the young version of Scott and Jean and he would be like Sebastian Shaw. Then Apocalypse would be very fitting as the major antagonist for the next trilogy of the original series.