Thanks to both decimation and the repeat of decimation with the current Terrigen mists story, the X-Men are deprived of new villains and a lot of villains with potential don't get fully utilized. What's even worse is both Apocalypse and Sinister have been reduced to beyond pathetic in their most recent appearances. Sinister gets his back broken by Colossus in human FORM. Then his head is cut off by Magik, and his head is in shield custody. Apocalypse in the future was so feeble Nightcrawler kills him with a SWORD.
Sinister and Apocalypse MUST be retired as villains.
Magneto himself, if there were in the 80s, was a brilliant scientist and pretty good as using powers. Without NEEDING a team for backup, he would have REMOVED the terrigen mists himself. He was able to assemble high tech machines with his powers in minutes in the 80s.
But back to the villains. End this endangered species crap, work out a deal with Fox (there are rumors that this is taking place) and let the next generation of A list villains come forward. Selene and Madelyne Pryor have excellent potential, and they could reorganize the Sisterhood with the Enchantress, Lady Deathstrike, the Mastermind sisters, and some other members. Exodus and Stryfe both have excellent potential as well. They could bring back the Gamesmaster. During Necrosha Selene brought back a number of mutants we didn't see her devour. Perhaps Shinobi Shaw and some of the Acolytes who died are back. Though Moonstar sent the Hellions to hell, maybe now that Selene is back she brought them back, as the hellions could make excellent villains if written right.
What I think should happen is this. It's Medusa who doesn't want the terrigen cloud removed because she worships it. Magik should join Maddie's Sisterhood. They should send the mutants back to earth and bring the Inhumans to Limbo. They could then banish the terrigen cloud to wherever, and then Magik should tell the Inhuman royal family if they have an issues with this she will offer their SOULS to SELENE.
Anyway for the fall it looks like some mutants in the comics will actually start doing something about the terrigen mists.