When The Avengers had released, it was the movie of the century, and there was no superhero movie like this. It is the only superhero team till date whose cinematic version had released after a very, very out long after the individual characters had their solo films and everything had been meticulously designed.
When 2012 had dawned on us, all the fans had seen The Incredible Hulk, Iron Man, Captain America and Thor. Now, this meant that the writers did not have to spend much time on the origin stories and other character development and backgrounds. Although the Avengers was kind of like an origin story, it focused on how the Avengers originated and how all the characters had come together to form the team. The fans loved it and 20 films later, the fans are yet again amazed by another ensemble MCU movie, Avengers: Infinity War.
Most fans have loved the castings they got and a few wondered how the MCU would have been without these actors and actresses. Fortunately, we have a lot of dedicated Avengers fans who have used their designing skills to reimagine the characters in the MCU if other stars had been cast for their roles.
Here are 20 Avengers fan castings that are way better than what the fans got: