James Cameron: A man obssessed.

Apparently he's filming an IMAX production about unusual sea life and the potential for alien life in such extreme conditions. I believe the title is going to be "The Abyss II". Leonardo DiCaprio plays the spectral ghost of a man lost at sea. In the climactic scenes he is transformed by the alien undersea lifeforms into an old man, an infant, the "sea-child", and finally, Charlie from the old StarKist tuna commercials.

No word on whether Cameron discovered the huge diamond last seen in "Titanic". Given the average cost of his films though, that could be the whole reason for this little trip.