It seems that Paramount was extremely unhappy with the script and the direction of the film’s development.
Orci produced the first two movies and had a hand in the writing. He moved to the director’s chair with the third film and, it seems, he was throwing out all the continuity that was established in the first two movies much to the chagrin of Darius Fisher. He came up with a (tired) time travel plot that would have brought William Shatner back as Captain Kirk.
Paramount had enough. The entire production has been shut down. Orci has been removed from the director’s chair and will just produce. The fact that they are keeping him on as producer is weird. You would think he would have gotten the total boot.
Bad Star Trek movie scripts are nothing new. The first film, Star Trek: The Motion Picture (1979) literally had no villain and was a boring talk-a-thon. William Shatner’s turn as director in Star Trek V was pretty awful. The Next Generation movies were more miss than hit.
And then there came the J.J. Abrams’ Star Trek reboots, which featured two really excellent films. Is the third film going to be an excellent one or will it be a high-profile dud? Fans are going to have to wait and see.