To be fair, I'd rather AvP, AvPR, Predators and The Predator not be canon to *anything* and be nothing more than mindless popcorn flicks 🤣
In my head, Alien canon is;
Alien
Aliens
Alien 3
Predator canon is;
Predator
Predator 2
Prey
Pathogen canon;
Prometheus
Alien Covenant
Alien
(Potentially) Alien Romulus * (has the potential to fit into Alien canon too depending on how heavy Prometheus is referenced / if can be passed off as a nod)
Aliens
Alien 3
Everything else is expanded universe, whether considered fun, good, or bad