Continuity mistake: When Miguel and Tulio first arrive to the island, they bump into a skeleton. When Cortes arrives at the island later in the film, there's only a skull. The bones that were there earlier have vanished.(00:14:50 - 00:39:50)
Trivia: Just before the Gods Speaker finds the picture of the jaguar in the book, you see a picture of someone fishing off a crescent moon: the Dreamworks logo.
Answer: The high priest's name is Tzekel-Kan.