10 Worst Reveals In Movie Prequels
5. You Remember Those Acid-Blooded Aliens, Right? - Alien Vs. Predator
While Alien vs. Predator was never particularly marketed as a prequel movie to either of the crossover's titular franchises, the simple fact of the matter is that AVP is most definitely an Alien prequel by its very nature.
Taking that on board, then, it makes zero sense how the crew of the Nostromo would have no idea what multi-mouthed threat they were faced with in 1979's Alien.
In Ridley Scott's iconic 2122-set Alien, Ellen Ripley and Co. were clueless about the mysterious otherworldly menace that was stalking them. Where Alien vs. Predator comes into this, is that the film shows how those toothy aliens had actually already visited Earth back in 2004 - making humanity well aware of their existence.
That is, unless somehow human civilisation had forgotten that xenomorphs were 'a thing'... because clearly the sight of a savage, slimy, brutal alien species is something that's easy to forget ever happened.
So while there wasn't one major disappointing reveal, per se, in Alien vs. Predator, just the fact that the film took place in the then-modern-day of 2004 totally undermined certain elements of Alien's plot.