Just go ahead.
Emily Blunt
Almost became Black Widow. Thankfully, the role went to Scarlett Johansson.
Edward Norton
was the Hulk for all the movies, but never an Avenger. That honor goes to
Mark Ruffalo, the Hulk we know and, for the most part, love.
Lastly, and my personal favorite,
Jensen Ackles
almost got chosen to be Captain America!
However, he chose Supernatural because of the large sum of money. This role was given to Chris Evans.
who, admittedly, is a
better
Cap when compared to Jensen.
I was also told that Jensen was also asked to play the role of Peter Quill, but declined, and the role went to
Christ Pratt, known for Parks and Rec and the Jurassic Park movies. By the way, I love Jensen as Quill.
Apart from that, he was also asked to be Hawkeye! He turned it down too, and this role was given to
Jeremy Renner, who I think is a much better role than if it had been given to Jensen.