Board Thread:General Discussion/@comment-27464043-20151230192612/@comment-26265723-20170718171819

@JAYANAND JAYAN03 The Soul Stone will almost surely be in Thor: Ragnarok, but I doubt it is going to be on Asgard, because I don't believe either Heimdall or Thor (via Mjolnir) could possess it. This is because it goes against the reasoning for having giving the Aether to the Collector: They didn't want two Infinity Stones so close together. Not just because it would have been unwise from a tactical standpoint, but also because (and I'm guessing here) that the stones might potentially react to each other's presence if in a close enough proximity.

I'm about 80% certain that Hela has the Soul stone or is somehow connected to it. She's the goddess of the Norse underworld so it fits her domain perfectly, and might account for the absurd amount of power she displayed in the trailer.