Giant plot hole if the original sequel(s) is/are no longer canon.
Hear me out because I'm sure people will be chomping at the bit to smash me since that's what everyone does on here. But I promise I'll do my best to make sense.
The entire point of the original 1978 Halloween was for Michael to escape and to find his sister to kill her. We find out in the original sequel that this was his motive. If any movie beyond the OG 1978 movie is no longer canon, except the new trilogy, then there's no reason at all for Michael to have purposely sought out Laurie in the orginal.
When he escaped during the storm in the OG, he was hell bent on going directly to Laurie because he already knew who she was. He was hanging outside bushes on her walk to school, out by the clothesline in her backyard, and standing outside her window watching her at school.
But if we disregard that she's his sister, then him specifically seeking her out makes no sense at all because he'd have no idea who she even was since they'd never once interacted before, let alone have a motive to kill her. I hope I'm making sense on this.
The new trilogy still sort of makes sense since he'd be trying to get revenge on her for their first encounter 40 years prior, but seems like a bit of overkill (no pun intended) for him to wait four decades to kill the person he had a 20 minute encounter with so many years prior. I know we have to look at it as we're dealing with a highly irrational psychopath's mind so he sat and stewed on it for 40 years, but it still just seems like a stretch to me.
Don't get me wrong, I love the movies, but taking the brother/sister angle out of the story makes his motives in the original completely pointless. Here's where I get crushed by everyone, so go ahead.........