Yeah Abrams was the reason TFA was pushed back to December from the originally planned May release. Production is currently slated to begin in January but he would never have a script done by then. And speaking of the script, reports are now that he'll have a co-writer; Chris Terrio. He did some of the writing on BvS and he also contributed a script to the pile in the dust bin for the Affleck Batman film. He's a fitting choice considering how much Lucasfilm is starting to resemble Warner Brothers in how it's run.