According to [Director Taika Waititi], 80 percent of Thor: Ragnarok was improvised, or ad-libbed.
“My style of working is I’ll often be behind the camera, or right next to the camera yelling words at people, like, ‘Say this, say this! Say it this way!'” he said. “I’ll straight-up give Anthony Hopkins a line reading. I don’t care.”
Although I do have to admit: if you had told me that Disney would let the Rogue One team get away with what they got away with I would have had precisely the same skepticism. I have to remember sometimes that at this point stuff like Star Wars and the MCU are established properties with plenty of room for errors and experimentation. The studio is unlikely to take a bath on the latest Thor movie, to put it mildly; and since it’s a minor piece of the MCU they can afford to shake things up a little. People are still going to go see it because it’s gonna have Thor and Hulk and Dr. Strange maybe and definitely Loki, after all — and because seeing all the movies helps you keep track of the big ones.
So, hey, maybe this is gonna be awesome.