first released 15 years ago, who could have foreseen it would win 11 oscars and blow away every box office record in sight. Three days from now, the film version will be released on dvd. We had nick... See More
first released 15 years ago, who could have foreseen it would win 11 oscars and blow away every box office record in sight. Three days from now, the film version will be released on dvd. We had nick watt sit down with the film's director, james cameron, who made history with the epic. Reporter: Cameron has dived that wreck 33 times. Also on the new dvd, cameron's nat geo documentary. The fun of it was to see how right we were. I think what we found out was, we were pretty darn close. Reporter: There was nothing where you thought -- going to reshoot the film? No. Reporter: Another extra release, nearly a whole hour of deleted scenes, for those who have seen the main feature, i don't know, 100 times. I wonder how many people think rose was on the ship. Well, we tried to make it historically accurate for a fictional film. For our culture, the movie may have more power than ten books written that are extremely accurate. Reporter: "Titanic" was the highest grossing movie of all-time. 2 billion-plus, until cameron's own "avatar," this one shot in 3d. He's revisiting that franchise. How many "avatars" are you going to do? Two or three? How long am I going to live? I'll do as many as I can. Right now, we're planning two. And we're shooting them together as a conjoined big megaproduction. Reporter: The part time director, part time ocean explorer, won't be returning to the mare yanes trench, the deepest point on earth, anytime soon. They aren't going to let you go back to the trench? It hasn't been said out loud. But if I were to go do a trench expedition right now, they might blow a head gasket. Reporter: "Titanic" was a project, on paper, no one A guy and a girl talking. In any other context would be a complete snore. And two hours is when the credits are rolling in most movies. That's when you're hitting the iceberg on "titanic." But somehow, that souffle does rise, it does work. Reporter: For "good morning america," nick watt, abc news, los angeles.
This transcript has been automatically generated and may not be 100% accurate.