In the original Friday the 13th, the serial killer made only a brief appearance in the final frames and never killed anyone. Jason didn't even don the famous mask until the third movie. The remake, however, will focus on Jason - who will wear the mask and kill - and keep the famous setting of Crystal Lake.
WTF? The fact that Jason was not the killer in Friday the 13th is a cultural touchstone. Ghostface killed Casey for not knowing it. It's almost as important as Michael's missing motivation in the original Halloween.
The new film's IMDB page lists it as an "untitled Friday the 13th project." Which is good. Because if Jason's the killer, it's not a remake. It's a sequel.
UPDATE: Someday five years from now, someone will point out that Ghostface killed Casey's boyfriend because she didn't correctly identify the killer in Friday the 13th. He killed her because, well, that's what the bad guys in horror movies do. Sigh, I need to proofread more carefully.