>>6754262(you) forgot the Reptilians and the Zetans.
Actually, I've always had a hankering for a Matrix spinoff that dealt with Area 51 and such. Basically X-Files in the Matrix. Werewolves, vampires? Those are renegade animalistic programs imperfectly hiding as humans. Bigfoot? Holdover program from a previous version of the Matrix. Aliens? They're programs whose origin even the Machines don't understand. Etc.