Out only ancient source for the existance of Atlantis is Plato, who claims that his father got the story from some Egyptian. The cocaine in the mummy shows that there had to be cross Atlantic contact of some sort or another (perhaps even just sporadic) in ancient times. Proving that there was contact is a necessary step to link a South American Atlantis to Plato. --BlackGriffen
"a great many films"? Name ten. :-) I certainly don't think "Atlantis films" are considered a genre like, for example, "War movies" or "Westerns".