The film looks vastly different than its predecessors, with far more humor and color than Thor's first two solo adventures. And now director Taika Waititi has revealed why he tried to make the threequel so funny. Aside from how MCU films require some levity, he said it was Chris Hemsworth's comedic chops that inspired him to include more humor, as his timing was underused in the past.
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I don't think they'd exploited that enough, not only in the Thor films or the Avenger films but in any of the other films he's been in. He's a real comic talent and I felt like that was something that needed to be showcased. I wanted people to be more on the side of Thor, make Thor the most interesting character in the film. There's no point calling the movie Thor if he's not the coolest thing in it.