I loved seeing Surtur in Ragnarok so i have high hopes for what could be the Midgard Serpent in L&T.
Always had a soft spot for giant fiery demons with Balrog being the ultimate example. The stuff with Surtur in Ragnarok was pretty cool, from that old weathered and scared version of him in the beginning, even his personality had some nice touches in his exchanges with Thor and at the very end seeing a prime version of Surtur wrecking shop in style... even his final remarks where great "Tremble before me Asgard. I am you wrecking". Good stuff.