Despite James Cameron's success with Titanic and The Abyss, you'd think the director would be water-logged by now! Not so. The "King of the World" headed back to sea again for his newest endeavor, Ghosts of the Abyss (opening Friday in IMAX and 35mm 3-D theaters). It's a 3-D documentary about — yeah, you guessed it — the shipwreck of the H.M.S. Titanic.

"The problem with Titanic is that every time you answer one question, you find some more," Cameron says. "So, you could continue to analyze that wreck site for years."

And he has! But before you get your hopes up for Titanic 2 — or start thinking Cameron has gone off the deep end — he says Ghosts will most likely be his final film about that fateful voyage. "We may use some of the footage that we gathered at Titanic this time... in support of [another] project," he considers. "But in terms of doing any more work there, I think I've got it out of my system."

What's next? The Columbia shuttle tragedy has temporarily grounded Cameron's ambitious plan to help NASA put a man on Mars. For now, he's focused on breaking new ground here on Earth. "I'm going to start shooting a movie either in December or January," he says. "It's going to be shot in 3D. I sort of passed the threshold where I became convinced that there was no compelling reason why we couldn't shoot a movie using the same technology [as on Ghosts], so that's what we're going to do."

He won't give away plot details, only this boastful hint: "Just imagine Titanic, True Lies, Terminator 2 or something like that, but in 3D." Time to dig out those cheesy paper glasses!