Trivia: Director Rick Rosenthal wanted to maintain the tactful and tasteful, slow-burn nature of the original film, and his original director's cut lacked blatant gore and nudity. However, writer/producer John Carpenter felt horror fans would not accept a film without extreme content due to the rise of various extremely graphic slasher-films in the wake of the original film. Thus, Carpenter went back and ghost-directed several new scenes to add in extra nudity and violence into the movie. (And if you watch the movie very closely, these reshoots can be pretty obvious, as they don't quite fit in with the rest of the film).
Trivia: A grim detail many don't pick up on... the man who is hit by the police car and burned to death is given the name "Ben Tramer." In the original "Halloween", lead character Laurie Strode very briefly mentions having a crush on a fellow student named "Ben Tramer." Not only is Michael Myers responsible for killing her friends, but his return also indirectly causes the death of her High School crush.
Trivia: John Carpenter originally wasn't keen to do a direct sequel to the first film. But he eventually relented and co-wrote this follow-up.
Trivia: Early in production, John Carpenter and Debra Hill wanted to set the film several years after the original, and have the movie almost entirely take place inside of a high-rise apartment building that Michael would infiltrate in order to finally track down and kill Laurie Strode. It was eventually retooled to take place in the hospital only hours after the events of the original.