>>8731234Kids don't really like horror, they like cool, Freddy is great now, don't get me wrong when I say this but he isn't "cool", he is "scary".
The scifi element of Aliens and Predators also opens them up to a lot of variation, like kenner did, you can make as many different types as you want and put the lore on the back of the box, this one is a lava planet predator, this one is a mantis alien, etc. vary how they look a bit and the children will eat it up. Like
>>8731241 mentioned, because they revolve around the concept, not the character, there is plenty more reason to have more than one.