Alien Versus Predator Versus Terminator Versus Marines
This has always been a sorta fantasy of mine, aight.
Planet in Conflict:
Ursa Majora 2798 - A planet that never sees day-light and is nothing but a wasteland, it was used as a mining installation until the colonies settled there were slaughtered by two different hives of Xenomorphs. In the eastern sect of the colonies a hive of Predaliens were awoken, and on the Northern sect a hive of Engineer-aliens, these Xenomorph were larger and stronger than the Predaliens and swiftly wiped them out with the colonies caught in the middle.
Aliens:
A large hive of about six hundred Engineer Aliens has settled on Ursa Majora. A mere chestburster is as large as an Engineer (see Prometheus).
Marines:
We have three delta sqauds of Elite Spec Ops Marine Commandos who've all had extensive experience in bug huntin (Xenomorphs), and in dealing the Preds (Teens mainly), as well as Cyberdine's T-800 who can infiltrate bases wearing human tissue. It's three squads of four Commando's, heavily armed and dropped off on planet to exterminate the Engineer Alien hive. There are twelve of them armed with heavy plasma weaponry.
Preds:
This is no mere gathering of hunters for good sport, this is war, no fair fights. They have come in to collect the skull of the Engineer Queen. This is ten Legendary Elder Warriors, yikes. Armed with more than typical ceremonial equipment, they have access to every weapon we see the Preds use in all five films they've been in. (Pred, Pred 2, AVP, AVPR, Predators.)
Terminators:
Cyberdine systems has taken interest in Pred technology, and wish to apprehend their gear after termination. Furthermore, one of the Marines headed to Ursa Majora is a key figure in the resistance. It has dispatched six Terminators, advanced T-X models (see Terminator 3). They are also armed with state-of-the art plasma weaponry with sophisticated heat-tracking sensors.
And begin.