History
After the Asgardians were attacked by Thanos' army in space, Heimdall used his powers to send the Hulk to warn Earth's heroes of Thanos' arrival in search of the Infinity Gems, unaware that Earth had already been ravaged by Undead and that the heroes had become one of them.[1]
Notes
- It is unknown if Heimdall of this reality died like his Earth-199999 counterpart, although due to the point of divergence occurred only on Earth according to Uatu he must be dead.