An extension of Ripley’s relationship with the face hugging, chest exploding alien hive. Or to be precise, the ultimate showdown between Ripley and the mother of all aliens (just occurred to me the alien species never has a name).

Ripley conceives of a plan to capture the mother of all aliens, and eventually destroy all aliens.
But the real kicker comes at the last pages of the story, when the real truth to the whole alien saga is revealed by the young girl that Ripley sworn to save.