Take this with a mountain of salt.
http://collider.com/star-trek-3-new-writers-abrams-leaving-star-wars-episode-7/
In a marginally related story, Star Wars: Episode VII may need a new director. Badass Digest is hearing rumors from multiple sources that Abrams is close to dropping out of the highly anticipated sequel. Abrams protested against shooting the movie in England (presumably because he didn’t want to be away from his family for so long), but was overruled by the studio. Although this decision wasn’t recent, the rumors of his leaving the project continue to percolate. Badass says these rumors will merit more serious consideration if there’s no announcement of any kind at Germany’s Star Wars celebration regarding Episode VII and Abrams isn’t present. It’s worth noting that if Abrams chooses to leave Episode VII, that doesn’t mean he’s automatically going back to Trek. He’s a highly in-demand director, and I’d expect he would have a wide variety of projects to choose from should he leave Star Wars.