It might not have received an R rating, but Warner Bros. is bringing the goods with their mysterious thriller The End of Oak Street, which plunges suburbia into Earth’s prehistoric past.

We can report today that the film is rated PG-13 for “some strong violent content, bloody images, some strong language and suggestive material.”

The End of Oak Street came out of nowhere with a teaser trailer that left us with more questions than answers, which is exactly what sci-fi horror auteur J.J. Abrams and his Bad Robot Productions...