Red Skull
When Red Skull is dying due to his imperfect Super Soldier Serum, he allies with MODOK who upgrades HYDRA's tech from A.I.M. to kidnap Captain America and has him transfer his mind to Captain America's body. After his defeat by a reassembled team of Avengers, Red Skull takes Iron Man's armor for its life support system. Red Skull attacks them at their mansion. Red Skull is once again defeated. The Avengers Mansion is destroyed during the fight. Red Skull plans to take away everything the Avengers hold dear from their lives to their country by trying to have them hated by the people for failing to save the day.