Pym vs the Mutant race
Pym has been messing about with AI again, trying to come up with something that will help humanity and the world and make up for what happened with Ultron.
Unfortunately this latest prototype also goes rogue and escapes from the lab. It immediately seeks out other AI but the first one it meets is a Sentinel. Mistakenly thinking that the Sentinel's programming is normal the AI decides to go on a mutant killing spree. It seeks out and slaughters hundreds of young unknown mutants who are only just manifesting their powers, before the X-Men track it down and destroy it. Inside the wreckage of the prototype they find the label "Made by PYM".
Cyclops and the rest of the mutant factions call a truce and declare war on Pym.
The stipulations are:
1) Pym was following what happened. He had three weeks prep time before the mutants declared war and went looking for him. Pym has access to his Infinite Mansion and everything that he was shown to have in it. He can choose to attack, or just defend.
2) No ridiculous HOM/mega reality warping/Phoenix Force type powers, but otherwise the mutants can call on all X-Men, associated teams, and affiliated mutants.
Can the mutants take out Pym?