In Alien, we would have seen detailed scenes of everyone's deaths. Jones would have met a horrible death, which would also have been shown on screen. We would have seen the facehugger impregnate Ash somehow and then we'd have a mechanical Alien monster that breathed fire.
In Aliens, we would have witnessed Newt's impregnation by an Alien and the chestbursting scene. There would have been a pregnant woman somehow surviving in the Alien Hive, who would have just woken up at the right time to breathe profusely before dying a horrendous death (read: exploding into millions of pieces).
In Alien 3, we would have seen the bald guys hanging around, having a good time. Then suddenly, the EEV falls and they look inside, and we're shown detailed shots of everyone's corpses. One of the inmates would then make witty and intelligent statements like,"F&* SH*@ MOTHE(%*ER. From the looks of it they're dead." Ripley would have survived, now portrayed by a different younger looking actor, would have been impregnated by the inmates after the successfully shown rape scene.
And, in the end, she would have died by either exploding or being torn apart.
In Alien:Resurrection, we would have seen the BS' dreams come true with flying King Aliens battling characters from Star Wars.
In Aliens vs. Predator, we would have gotten a sequel to A:R, with the Predators battling giant Alien Kings and characters from Star Wars... And pregnant women exploding.
