Originally Posted by Rock Sexton
It would be lame to try to stuff Surtur in his entirety on top of Malekith, Kurse, and the Dark Elves. Somebody would get short-changed in the process. I'm all for Surtur's presence felt, but as the bridge to Thor 3.
Well, this came up before, but Surtur doesn't need to be in it much. He would be in the background, probably be the one who transforms Algrim into Kurse, and then he would emerge for the finale.
I'd say that's looking increasingly likely. Though there are other possibilities, of course.