Doombot had been imprisoned by Dr. Hank Pym. However, after the defeat of Ultron, Pym changed his policy about keeping artificially intelligent prisoners and began reprogramming the Doombot. As a failsafe precaution to maintain Doombot's loyalty, Pym implanted a micro black hole in Doombot's chest.
Following the death of Pym and the disbanding of the Avengers A.I. team, the Avengers seemingly lost track of Doombot. When Doombot learned of the "death" and reactivation of Victor Mancha, Doombot traveled to the Hostel to offer to create him a new body.