The shot of the Sentinel's flying next to Magneto in the trailer is misleading - FilmNerdJamie confirmed as much a couple days ago.
Originally Posted by metaphysician
I continue to boggle at the idea of "future sentinels as masses of magnetized metal shifting their shape via magnetism." It just seems so. . . obvious achilles heel, and just beggining the fridge logic.
The Sentinels - both past and present - have magnetic shield boost capabilities so that renders Magneto useless against them. Not to mention, it also sounds like future Sentinels have the ability to mimic mutant abilities.
So yea, everyone is screwed.