Fans of Marvel Studios have come to appreciate Chris Hemsworth's version of Thor for the past seven years, and the passion they radiated turned into Marvel's Out of favor. Thor: Ragnarok was a massive hit last November and became one of the studio's top rated films.
It may be a surprise, but this desire for Thor was not always there, and Marvel had some great concerns about the character in the first Avengers in 2012. In fact, she actually considered Studio to give him a much smaller role in the movie, as well as the MCU in the future. 1
Penn was first commissioned to work on The Avengers before some of the Phase 1 films were filmed. Some of the main characters, like Thor, had not been occupied at the time. Penn worked with all Phase One directors and adapted his script constantly, which was what happened in the other films.
It was at this stage of the process, before Hemsworth had got the role of Thor, that Penn had been active cutting off the part of God of Thunder in the movie. After seeing Hemsworth walking through the studio for the first time, Penn knew something had to change.
"I remember Chris Hemsworth walking through the Marvel offices saying, 'Oh, my God, this guy is Thor!' Penn continued, saying that his direction changed with character. "Originally, I tried to reduce how much Thor was in the movie, once it was clear that, no, that will work and they were thrilled with it, then I did not [reduce Thor in the script]I stopped it."  The rest, as they say, is history. Although Thor: The Dark World was a small disappointment, the character became a crucial part of the Avengers team as we know it today. As Ragnarok just proved last year, Thor can bring a hammer to the cash register if you just let it go.
Thor will be seen again on the big screen on April 27 Avengers: The Infinity War hits theaters around the world.