Here we go.
Do you really want to do this?
I'll start by saying that your opinion on "canon" is an interesting one but far from an authoritative one, and I disagree with nearly everything you said.
Quick bullet points:
- "canon" and "continuity" are not synonyms
- "it was never canonical", aside from being technically false since it was in the official Predator Bible and was thus considered canonical by *someone* of authority, doesn't mean anything.
- "Do we really want it to that badly? Not really." - you don't speak for everyone
- "What's the point?" - the point is that some people still like the story and are willing to make concessions to work around it so that it isn't stricken from existence in their head if they don't want it to be, and that's a perfectly valid reason.
- saying someone "isn't a true Christian" because they don't believe the same exact thing as you is a wild take when we live in a world where there are multiple denominations of Christianity, and it's a little too close to saying "you're not a true fan if you don't follow the canon" for my liking
- "official canon" is not a useful concept for the end-user, and head-canon trumps it 100% of the time. Your head-canon might happen to align with "official canon", but no one is obligated to follow official canon. The core deciding factor for enjoying fictional franchise media should always be "what brings me the best enjoyment?" If that means introducing other ideas or omitting ones you don't like, there is nothing wrong with this.
Here's some light reading for you about canon (and why it doesn't matter):
https://tinyurl.com/yau8de97https://tinyurl.com/ybm4qvhchttps://tinyurl.com/ybv6m5skSide note, I spoke with Andrew Gaska (the former keeper of the Predator Bible) about the pistol, and he said that the way he'd approach it is the way SuperiorIronman presented it where you massage it to be a different pistol and different Predator and it's just its own cool little story and not related to Predator 2, and that 1718 is a loosely-remembered tall-tale and that the exact words and drawings on the page aren't meant to be taken as literal fact - it's the same approach the Alien RPG does with its myriad EU references.