There are genuine plans for a May 13th, 2013, release theatrical, with T.V. hours to follow. [However,] there is no green light in place yet, as the scripts are not done, which means the budgets are not done, but Universal is giving very strong support. There's also a very ambitious Game component being planned that will further utilize elements from the books. [If everything continues on schedule and the budget is approved], it looks like things are coming together for a late-summer or early-September start.
Thanks to Ari.