OP hasn't been updated in a while, but more info came out yesterday http://deadline.com/2017/12/quentin...rew-pearce-lindsay-beer-jj-abrams-1202222161/He'll come up with a great idea and then the studio will do it without him.
If Tarantino is dead-set on that R rating, that's what will kill the deal. No way does Paramount agree to an R-rated Star Trek.
"Tarantino has required it to be R rated, and Paramount and Abrams agreed to that condition."