Nick Cassavetes (John Q, The Notebook) is in talks with Marvel to bring Captain America to the screen. CHUD reports that his mother, Gena Rowlands has said that Cassavetes is thinking of doing Captain America, following his involvement with Iron Man.
Cassavetes was attached to Iron Man for a long time before the film was turned over to Jon Favreau. Apparently whatever ended his involvement with Iron Man didn't sour his relationship with Marvel.
Captain America will be a joint project between Marvel and Paramount Pictures. If the film is green-lit, all of the original members of Marvel's Avengers will have a modern film either in-production or already released.