And I don't think that was old king Thor that died, well I do t think it was OKThor from 616 at least. How and why do I think this, simple because hi beard was not white.

@Asgaard: what do you think ?

Link

"By the scans, dialogues and narrative this character is only an older version of Doom's Thors, someone who was created by Doom and Strange in the battleworld context and it's there since the beginning unlike other/new Thors, seems that the Thors will be ranked according to their power level, any police force even Thors (another ridiculous interpretation of this character) has to have hierarchy, if ultimate Thor and BRB are detectives, Old King Thor will be ranked above them, can't be this character that acts like just one more Thor and calls brother to everyone"...

Yes this aint OKT. We can see on the cover of Thors #1 that OKT is present there. with white beard :)

Since the moment this question first came up I didn't think that was 616 OKT.

@asgaard: yeah I think you might be right, also the mjolnirs I think where all created by doom.