At this point, the Marvel Cinematic Universe seems they can do no wrong. Their movies are critical and commercial successes and the actors have become synonymous with the heroes they play. However, Chris Hemsworth once thought Marvel was so unhappy with him he was going to be dumped as Thor. The actor recently admitted that when he realized he wasn't part of Captain America: Civil War he was afraid that was a sign that he was being cut out of the MCU entirely.
One can understand how Chris Hemsworth might have become slightly paranoid when discovering that he was one of only two Avengers not part of Captain America: Civil War. The film was essentially Avengers 2.5, and if you're not invited to the party you start to wonder what exactly you did wrong. The actor tells Entertainment Weekly that Marvel responded "quickly" so hopefully Hemsworth didn't spend too long thinking he might be out of a job.
One wonders if Mark Ruffalo had similar feelings upon discovering he wouldn't be in Civil War. Ruffalo himself was cast as a replacement for Edward Norton who had played the part in Marvel's The Incredible Hulk. Was there any fear that Marvel may have decided to recast the role again?
As the actor says here, Thor's journey through this part of the Marvel Universe is simply on a different path than the rest of the Avengers. While we're still waiting to see exactly what that looks like, we know that Thor: Ragnarok is a bit more cosmic in scale, which would make Thor dealing with the events of Civil War feel inconsequential by comparison.
Chris Hemsworth didn't entirely let go of the fact that he was left out of Captain America: Civil War. He released the occasional video asking why nobody bothered to call Thor. In addition, a series of short films entitled Team Thor have been seen now and then which show what the God of Thunder has been up to while all of his friends were beating the hell out of each other.
We're certainly glad that Chris Hemsworth's fears were unfounded. We can't really imagine anybody else playing the part of Thor. Thor: Ragnarok is set for release this fall and it will move the stories of both Thor and the Hulk forward toward the events of Avengers: Infinity War, a film which we can be fairly certain will include everybody.