In regards to its rating, while I'd love it to have an R rating, the quality of script, cast and direction takes precedent in my line of concerns. In the wise words of Yoda: Make a great film, gore does not. And I would assume the majority that prefer AvP over AvPR would probably tend to agree.
The Skulls general premise sounds like a good start to me though and a back to basics approach, but of course, we'll see how it all shakes out. 🤞