Sorry for the delay on this, I didn’t pick up the issue until today.
At the end of Fear Itself Thor died and was burned in a pyre, the Thunder God Tanarus rose from it. Memories of everyone were altered, there was never a Thor, always Tanarus. Something only Loki was aware of.
So is Tanarus, God of Thunder? Is he a creation of the All-Mothers? The aftermath of the same prophecy that led to Thor’s demise?
Or maybe he’s just Ulik the Troll, wearing a magic spell that makes him the hero of Asgard while Thor ceases to exist.