The report varies between him accepting a 9 picture deal and a 4 picture deal (with both claiming to include 3 Captain America films) which would see Evans taking part in the future Avengers movie as well. The following report from Lucas Siegel with Newsarama makes note of both a Twitter comment posted by Iron Man Director and Avengers movie Producer, Jon Favreau, as well as a comment made by an as yet unidentified Producer of one of the upcoming Marvel movie projects:
While not an official confirmation from Marvel Studios, Jon Favreau, who directed the two Iron Man movies and is a producer on team film The Avengers which will bring Captain America, Iron Man, and Thor together, just posted this on his personal Twitter account:"Welcome to the new Captain. He continues the fine tradition of playing two Marvel characters!"
The Hollywood Reporter [earlier reported] that actor Chris Evans has accepted the role of Captain America in the coming film. The actor was, according to their sources, offered the role on Friday afternoon Mar 19, 2010, and "after thinking things over" has decided to play his third superhero, and his second major franchise from Marvel Comics. ... While the report has yet to be confirmed by Marvel or any of Evans representatives, THR is confident in their sources. Evans is 28 years old, and will fight alongside Robert Downey Jr., 45, and Chris Hemsworth, 26, in the coming Avengers film, as well as in his solo flick. In fact, the deal was rumored to be for 9 movies altogether, covering multiple sequels in both franchises, though Variety now reports that it is for 4; 3 "Cap" films and 1 "Avengers."
(Newsarama.com)
Personally, I did not really like Evans in the first Fantastic Four movie but thought that he was okay in the sequel. I was much more impressed with his performance in the movie Sunshine, which I saw on video late last year. I admit to feeling somewhat ambivalent about this apparent casting at this time since I see him as being capable of pulling off the iconic American superhero persona if given a decent script to work with. Of course we should soon expect to hear something official on the state of casting for the movie and then we can all have our 2cents worth on the subject...