Justin Hammer (What if?)

Justin Hammer is a former CEO of Hammer Industries and a rival of Tony Stark. Desperate to bring Stark down, Hammer seized the Avengers Tower during the Christmas party, with only Happy Hogan, Maria Hill and Darcy Lewis to oppose him. Hammer initially wanted to gain power by acquiring a sample of Hulk's blood, but Hogan received it instead, so he instead used the Hulkbuster Armor. Hammer was defeated by Hogan before the Avengers arrived, and was saved by him from falling.