Eventually, it was revealed that Paramount was working on two separate Star Trek films: Star Trek 4 and Tarantino’s idea. Neither J.J. Abrams or Justin Lin would be returning to direct Star Trek 4, and S. J. Clarkson was soon named as the director, making her the first woman to direct a Star Trek movie. Along for the ride were the majority of the cast which included Simon Pegg, Zoe Saldana, Karl Urban, and John Cho. Abrams would return to produce alongside Lindsey Weber, and writers J.D. Payne and Patrick McKay would pen the script. The movie would go into production before Tarantino’s, who still wasn’t 100% confirmed to be directing his pitch. With all the important pieces assembled, one would think that it would be a straight line to production, but nothing ever quite simply is in Hollywood.
Article source: https://www.cinemablend.com/news/2465291/events-led-to-star-trek-4-in-development-hell