I think several of the things you've said there are misconceptions. Firstly, "they" probably don't give a shit about the comics, because "they" are Ridley Scott. This is my own only-the-movies-are-canon bias speaking, but I think the comics do not influence the movies, it's the other way around (except maybe marginally).
Secondly, there aren't any "pure" xenomorphs. All xenomorphs are hybrids. The ones from Alien and Aliens, the ones we call "Drone" or "Warrior", come from humans, so they have human traits. The Predalien and the Runner/Dogalien are just as pure as them. They each have traits from their respective hosts [Drone - bipedal, human skull; Predalien - bipedal, decorative plant at the end of the tail (???); Runner - quadrupedal, likes sniffing people while they shower] but they aren't different breeds. The Newborn doesn't count because it was a product of cloning, so it was an actual hybrid, but it's dead now.
Lastly, as I understand it, the xenomorphs from Prometeus are supposed to be an origin story for the final product. While they are a different breed, they didn't evolve separately from the xenomorphs in the original trilogy, but are sort of their ancestors, though I assume the evolution would happen very quickly, since that's what the goo is supposed to do. I don't think they would coexist for long enough to fight each other, or that they would somehow be motivated by territorial disputes, even if they're generations apart.
So no, I don't think there will be any xenomorph infighting. Do we actually know that there will be different generations of xenomorph in the movie? Because I haven't read anything like that so far (not that I've been looking).
READ THE RULES
A song about me and skull_ripper that I wrote:
"Yeah, uh, yea yeah, uh, yeah, crackers gonna crack yeah, uh, yeah..."
(thats what I have so far hope u like it)