Miguel is voiced by the well-known SHAKESPEAREAN ACTOR, Kenneth Branagh, who besides being credited for directing/starring in an all-star adaptation of Hamlet, was also the fantastic asshole Gilderoy Lockhart in the Harry Potter movies.
Edward James Olmos, who also played William Adama and Gaff, voices the chief of El Dorado.
And the sailor who keeps losing to Miguel and Tulio at the start, and declares that they use his dice? You know who that is? JIGSAW!
What Could Have Been: If this film had made its money back, we could have a whole franchise of them by now. They deliberately sprinkled the film with sequel hooks, and were already in the early stages of plotting our the sequels. One alternative ending to the film actually had them In Medias Res in their next adventure.
It also was going to be revealed at the end that the armadillo was an angel/spirit sent to help Miguel and Tulio. Makes sense when you think about it, considering all the crazy stuff that happens with it around, including pretty much flying through the ball hoop.