Holy crap I just realised something…
I got a nagging feeling when I saw Loki in Jotun form, that I’d seen something similar before. Then I remembered: he’s a dead spit for Grand Admiral Thrawn from the Star Wars Expanded Universe novel Heir to the Empire by Timothy Zahn. Thrawn is a Chiss, who have dark hair, blue skin and red eyes. He’s also a tactical genius who’s been exiled from his home planet. He’s on the side of the Empire and is in charge of an army (unfortunately, the Rebels do not have a Hulk).
If they ever make Zahn’s rather brilliant Thrawn Trilogy into a movie series (not likely, alas, as it also has Luke, Leia and Han and the respective actors would be to old - it’s set just after the Original Trilogy), Tom Hiddleston would be a pretty good choice for Thrawn, if only for the “Hee, Loki in Star Wars!” angle.
Huh. Good point.
Also, I surprisingly don’t hate this fan-casting (I hate fan-castings 99.9% of the time) despite being rather neutral on the Hiddles.