I posted this in another thread but it's relevant to this one so:
The script hasn't even been written yet, therefore, the movie cannot be officially "green-lit" (no script + no budget=no movie). Example: Peter Jackson was just at SDCC talking about "The Hobbit". He had to clarify the rumor mill, explaining that the script wasn't finished yet. Without a finished script, there is no budget allotted by the production company. So the deal is not in place. Everyone just assumes "The Hobbit" is happening, but that's not the case.
I'm not getting my hopes up for anything just yet.