It's Magneto, done in his Marvel vs Capcom style which is essentially Jim Lee's art. He was made from a new DC Superheroes Superman body and cape. The helmet is a retooled ML3 Magneto helmet and the open hands are from a SOTA SF Remy figure. See the little fork on the front of the helmet? That's made from Aves Fixit Sculpt, it's so hard you can't break it off! The chest, glove, belt, and boot sections were all sculpted with Fixit Sculpt too.

Magneto's Magnetic Tempest attack was made from lumps of Fixit Sculpt with screws in them so they would attach in place of his hands. See all those little bits? They're bits of two chopped up ML Silver Surfer boards pushed into the FixitSculpt, along with other various pieces. Twistie ties extend tp hold the cerebro mask, twisted rifle, Ultron head, and various other metallic items that Magneto is using for the attack.