According to Jim Hill Media, Disney registered the following domain names just the other day: NationalTreasure3DVD.com and NationalTreasure4DVD.com. This means that, yes, most likely plans are already underway to shovel out two more National Treasure sequels. A third installment was already set up at the end of National Treasure: Book of Secrets, and now that the film has grossed over $200 million, another Nicolas Cage adventure is all but certain. But when, and what will it be about?

Well, Jim Hill says the sequel probably won't hit theaters until Christmas 2010, and in the meantime -- in order to keep the property fresh in people's minds -- Disney will release a bunch of National Treasure-themed children's books; the first of which (Changing Tides, a Gates Family Mystery) already arrived in bookstores back in November. Additionally, there are also some minor rumblings that Disney will also create a theme park ride geared around the franchise. Though a script cannot be written until the writer's strike is over, a top secret plot description is making the rounds -- but keep in mind this might (and most probably will) change. Possible spoiler warning ahead ...

Hill says, the third film will "send the Gates family off to Easter Island and beyond in search of Atlantis. More importantly, the pure, clean power source that was supposedly lost forever when this ancient civilization sank beneath the sea. Which -- were it to be harnessed today -- would immediately put an end to global warming. Not to mention making gas & oil obsolete." Are you a fan of the franchise? Where would you like to see the Gates Family travel next? (And if I asked Weinberg that question, he'd probably say direct to DVD.)

[via Slashfilm]