The only reason it came out this early, because Avengers is two years away, is that they’re thinking OK, we may throw him in Thor, we may not, as a cameo. You know what I mean? So there’s truth that we talked about it, but there’s no truth to me doing it.
Renner would have been a perfect fit, and while actors denying rumors that turn out to be true is par for the course, I'm not familiar enough with Renner to know if he'd do something like that. I never thought it made sense for Hawkeye to show up in Thor, but like Renner said The Avengers is two years away. There's still time for Marvel to make the smart move and bring him aboard.
You can read the rest of Renner's interview with Movieline right here.