I'm not saying it's not a reliable report, it probably is, but - again - he's attached to so many projects. He's becoming the Q.T. of projects (where usually those reports are true, it's just he's got A.D.D. or something).
I think the likelihood of it happening is slim due to the rights. I highly doubt Raimi would want to jump into The Hobbit right after Spider-Man 3, as he said he'd like to do a smaller film, and by the time he'd be ready - P.J. will have the rights back in his driver seat.