They state :In a backstage interview following the Golden Globes where Ridley Scott’s recent science fiction The Martian came away with 2 awards, Ridley Scott commented that he would be aiming for a Hard R rating for the Prometheus sequel, Alien: Covenant. When a reporter commented on fans being interested in the horror aspect of the Alien series, Ridley Scott responded “that’s why I’m doing it. I’m going to do pretty Hard R.” He further elaborates that he wants to do a scene with the same sort of impact that Alien’s original chestburst scene had but something “much worse.”
That sounds great to me; I still would have liked to see that other Alien sequel with Hicks and Ripley returning but this will do also.
Source: AVP Galaxy