It's often been argued whether the AVP movies should be part of the canon, or be a separate franchise altogether.
I think it should be a little in-between. Any parts of the AVP movies that do not contradict the solo movies can be considered canon. Like the Aliens being trapped in the pyramid, and the town being nuked in AVP:R, as most of the human race remained ignorant of the Aliens' existence after AVP:R, not to mention all the Aliens were destroyed, allowing humanity not to worry about them, until much later in the future. The PredAlien's reproduction method, however, was a blatant contradiction that should obviously be ignored.
I wouldn't mind if certain AVP movies were canon, and others not. Not completely restricting them to the canon could provide certain opportunities as far as scripts are concerned, imo. Best of both worlds, and all that jazz.