Pepper Potts
In the final issue of "Marvel Zombies 2", the remaining zombies are transported to another universe. At the point where the zombies reach this new reality, the period is nearly identical to the one where Tony Stark was an alcoholic. Zombie Giant Man infects Happy Hogan, Pepper Potts and a number of other people at Stark Industries. A drunken Tony Stark lacks the will power to become Iron Man despite Pepper Potts' requests, so James Rhodes dons the suit to save him. Crucial to fate of the multiverse are the nanites that Stark has accidentally created, which destroy damaged flesh and tissue as a cure for cancer, and prove to be a potent weapon against the zombies. This was grafted onto Flint Marko's body. He sacrifices himself to kill several zombies in Stark Tower, with Rhodes permanently succeeding him in the role of Iron Man. His nanites are then used by his successor, now a member of the New Avengers, years later to kill the remaining super-powered zombies and end the inter-dimensional zombie threat.