It appears to be official. Following a recent report that he was after the job, Variety is reporting that Star Trek and Star Trek Into Darkness screenwriter/producer Roberto Orci will direct the 13th franchise feature. Orci is joined on the project by screenwriters Patrick McKay and J.D. Payne, who will help him pen the next adventure of the Enterprise crew.
There's no announced timeframe for the next Star Trek film as of yet, but the franchise will be celebrating its 50th anniversary in 2016. If the plan is to have a film in theatres to tie into the occasion, expect official announcements on the film in the very near future.