I love seeing Surtur with Twilight. And i would love to see prime Surtur stomping around Asgard... They have laid the groundwork for this to happen by having his [BLACKOUT]faceplate in Asgard already. [/BLACKOUT] That combined with the Eternal Flame should make my ideal scenario come true. And with that having Odin returning to confront Surtur would be so sweet.
The thing is if Surtur indeed appears in his prime form in Asgard why and how would that ultimately happen. Is Hela somehow defeated and as a last resource she decides "If can't rule over you then i'll destroy you and rule over you souls" kind of situation with her reanimating Surtur by giving him the Eternal Flame.
There's so much epicness to be explored with a prime Surtur.