Thor (Chris Hemsworth) has "a long story" to tell you in Marvel's first "Thor: Ragnarok" trailer, but don't worry -- it ends with him happily reuniting with "a friend from work."

This new trailer introduces us to hammer-stopping villain Hela (Cate Blanchett), and possible eventual love interest Valkyrie (Tessa Thompson), and previews Thor's battle with The Incredible Hulk (Mark Ruffalo) in the games staged by The Grandmaster (Jeff Goldblum).

Thor surprises everyone in the gladiator pit by being pleased to see his opponent:

"Yes! We know each other! He's a friend from work!"

Yeah, but this time they're more like rivals from work, engaged in their own powerhouse "Civil War."

Here's the trailer, set to Led Zeppelin's "Immigrant Song":And here's the new poster Marvel shared at the same time, showing off Chris Hemsworth's new hairdo:

"Thor: Ragnarok" -- which also stars Tom Hiddleston, Idris Elba, Jaimie Alexander, and Anthony Hopkins -- opens November 3.

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