The rating was a sticking point in order for Tarantino to sign on as director (all of his films have carried the rating), and Paramount agreed to those terms.
That being said, R rated films have managed to make a lot of money recently.
It's reported that Tarantino met in a writers room with Mark L. Smith, Lindsey Beer, and Drew Pearce, that they came up with ideas for the film, with Mark L. Smith (The Revenant) looking like the frontrunner to write the flick. Smith is reportedly the front-runner for the job of penning the first draft of what would be the next Star Trek movie. It is also unknown if the new Trek adventure will involve the current cast, or even take place in the same alternative timeline to the original William Shatner-led series. His Star Trek movie could go into production shortly after that releases in August 2019.
The first and most important piece of information: The planned film will be rated R, which we can only imagine is a significantly easier sell to the studio after the heavy success of films like Deadpool and Logan, which took their nerdy and childish pedigree and crafted successful adult-appealing takes on the material. The second installment, Star Trek Into Darkness, earned more than $460 million worldwide when it opened in May 2013.
It would be interesting to speculate on what a Star Trek movie would look like, with Quentin Tarantino's unique style of filmmaking. If he's selected, he will overtake Justin Lin who directed 2016's Star Trek Beyond.
The other key thing that's been revealed about the movie is its rating - apparently, true to Tarantino's main body of work, this film will enjoy an R-rating.
Star Trek fans might have to prep themselves to boldly go where no motherf***er has gone before.