Technically true, but Apocalypto was still a GREAT story and a great movie. The blend of Maya, Aztec, and Europeans was a different spin, but Gibson never claimed to be making historically accurate movies, just good ones. Honeslty who actually saw this coming?
I mean sure. But neither did Nolan ever claim the Odysee would be a historically accurate movie (never mind it being basically ancient greek superhero comics to begin with).
