Predator actually came from two unknowns, brothers Jim and John Thomas, struggling screenwriters who wondered what it would be like if somebody made a Rocky sequel where he fought an alien. Originally called Hunter,

In the years to come they would share top billing in comic books, video games and eventually a couple of movies, to the extent that the two franchises now feel indelibly linked, even when new installments of each monster’s movie makes no mention of the other.