The movies are the original source, hence why they are the canon... Otherwise and maybe because of that self-inflicted inconsistency, we have a complete mess coming out of COVENANT... The lore, canon is supposed to give consistency, coherence and logical chronology and causality of events, but instead we have comics contradicting movies, games contradicting movies and vice versa, we have prequels that feel and actually are more like retcons, etc... Canon is supposed to exist to make movies coherent, be it sequels and/or prequels... Without that, we get this mess, where comics are considered canon even though they are never addressed in movies nor do the directors or even writers take them into any consideration, we have games that, for instance, resurrect dead characters that are still non canon because there are no movies still that address it.. That misconception of what canon is supposed to be is why we have fans saying with a straight face that each fan creates his own canon... Canon, by definition, is a guidebook you can only add to and not change... Movies are the source material, so they are the canon... The rest are mere creative derivations that create interesting stories but that ultimately are not taken into consideration in the movie making... ALIEN started it, ALIENS added to it, PREADATOR, PREDATOR 2 ( where we saw a Xeno skull, also undermining David as ultimate Xeno creator), and PREDATORS directly addresses Dutch and his team's encounter with the Predator, so it is also part of the canon... AVP's only contact point with the ALIEN movies, besides the Xenos, of course, is Lance Henriksen's Charles Bishop Weyland, and that alone is not enough to make it part of the canon, but it also does not say it is not... The contact point with it is so tenuous and vague, with this Weyland being perfectly able to be Peter Weyland's ancestor... COVENANT changes way too much to not directly conflict with ALIEN, ALIENS, PREDATOR 2, etc... And even though it is possible for Ridley to be able to tie these prequels to the original ALIEN quatrilogy, minus AVP and PREDATOR 2, which FOX itself will have to address eventually, it still begs to wonder what will Ridley do to tie these movies with ALIEN... He already said these are prequels to ALIEN,so he is not aiming to retcon it...even though publicly stating that David, and not the Engineers, created the Xenos, is a retcon to me...