Skulls equal to; A.I, Muthur, Ron Cobb Spaceships, Synthetics, W-Y, Seegson, USCM, USM, (Unusually long) Cryosleep, Shake and Bake Colonies, Engineers, The Pathogen & even more!
Yeah, right.
As for Prometheus- well, there you go- bill it as the Prometheus series then.
@Perfect-Organism
Or Black Mirror.
Or Mad Max, none of those entries are directly connected and
apart from the first film Max isn't the driving force of the plot-
he gets caught up in it.
There's lots of ways to do Anthologies.
I'm not a proponent of ditching the Alien altogether, just like I'm not a proponent of ditching the Alien Queen.
But you don't need either 100% of the time. Especially with the universe Alien set up beyond the monster.