Trivia: Originally, the new "Ghost Face" mask was meant to be made out of human flesh that was being stretched over the killer's face, hence it distorts and resembles a "screaming face" like the original Ghost Face mask. This idea was dropped relatively early in filming. However, several scenes had already been filmed with the killer for the pilot, so in some shots, the mask is actually a CG model that's been added in over the original. (Though thankfully it's hard to tell which scenes have the digital mask).
Trivia: Almost all of the rock songs in the soundtrack (which are primarily songs Ash listens to on the radio) are from the 1970's and 1980's. This was done on purpose, to help illustrate how Ash has been stuck in a state of emotional arrested development since his original adventures - he hasn't really grown as a person since.