Avengers: Infinity War - EVERY Soul Stone Theory Ranked Worst To Best
10. It Gave Heimdall His Powers
It might be a coincidence, but the fact that Heimdall's powers in the Thor movies have been revealed as him being able to see "every soul" in the universe has a particularly noticeable resonance.
That is perhaps where the theory that Heimdall's powers are the product of the Soul Stone (somehow channelled by Odin, perhaps) - along with the "evidence" that his eyes are the right colour for the Stone.
After all, all of the other Stones have been revealed as behind another existing power in the MCU. Why not a living being's powers? And we do know that Heimdall is in Infinity War thanks to the new poster.
Response
Well, the theory is a clever-sounding one, but it misses the fact that Heimdall is basically a God in the MCU, like all of the Asgardians. To have only his powers explained an Infinity Stone would complicate the rules of Asgardian physiology and mythology, and it's just not very likely.