Unless you have something beyond the Cinescape story, it's not only rumor, but not very believable either. Abrams planning to visit a set suddenly means Affleck is Kirk? None of it is even sourced. Some effects guy says "some others have heard" that "Ben is talking to Paramount." Please. Besides the tenuousness of the article, if they really are doing a "Kirk at the Academy" movie--which Abrams has failed to confirm--why would they pick a guy who is just about the same age Shatner was when he first played Kirk back in '66?
To be honest, I'm not interested enough to get all that excited about it, but I've heard it from a friend who edits a movie magazine.