Originally Posted by cherokeesam
Yeah, the fact that they specifically said both Algrim *and* Kurse appear in the movie means that the transformation will happen in this film. Otherwise, they could've just gone with Kurse as a generic bad mofo for Thor to fight.
The only looming question is, of course, who (if anybody) will assume Beyonder's role in transforming Algrim and manipulating him into blaming Thor for his problems.
I know this doesn't follow the comics, but what if Malekith uses some ancient spell to not only summon but to control Surtur. However, when Surtur see's Malekith's betrayal of Algrim (by attempting to kill him), Surtur sees it as an opportunity to turn Algrim into Kurse, enabling him to exact revenge on Malekith and in the process releasing himself from Malekith's control.
Just thought I would throw it out there.