As reported last week, Roberto Orci is no longer directing Star Trek 3 but will retain producer credit on the movie. Now I think that means his involvement with the film will be next to nil but his posts in the comment section of TrekMovie.com seems to contradict that.
On comments about his level of involvement with ST3:
203. boborci - December 6, 2014
I will be very involved:)
To a comment about his inexperience as a director:
206. boborci - December 6, 2014
185. not at all. still excited to makeTrek 3! And on time. We’ll find the right director!