I'm not positive obviously but I don't think that's Algrim, the weapons are different than the Elves on Greenwich. I don't think we've identified any races for sure. Trolls are suspected for several, and there is a guy with horns that looks like a Demon.
FYI, part of an interview with AAA from Comicbook.com
And Oh, MY. he spilled something here re: a Frigga scene...
ComicBook.com: And is it a really interesting working environment? I mean, you can find yourself just surrounded in the Marvel Universe now with Academy Award-caliber actors, with actors who are the top-grossing actors of the last decade.
Adewale Akinnuoye-Agbaje: Yeah, I mean look: I can recall the scene. I’m in the scene and Renee Russo is in my arms or beside me and I’m facing Anthony Hopkins and Chris Hemsworth and Chris Eccleston–and just about every great actor within that genre is in the room and you just realize it’s a great privilege and honor. To be opposite Anthony Hopkins and to watch him work is just…amazing.
PS: I'm hoping to see Hela as well.