A douchebag? Have you ever heard the guy speak? He's the Carl Sagan of our time.
Look, I've seen the guy on TV. He is definitely well-spoken, highly intelligent, and a captivating speaker. I like him.
But there is no way in the known universe that he is "cooler" than James Cameron. Cameron is responsible for Terminator 1 & 2, and goes to the bottom of the ocean floor. He is at a level of "cool" heretofore unseen by Tyson.
True Lies, The Abyss. The guy's a genuine badass. Anybody who doubts that needs to watch
the making of The Abyss. One of the most difficult shoos in the history of cinema.
As for Titanic, don't know if it's been done,but there needs to be a fan edit that removes the entire Jack/Rose love story (leaving KW's tits in, of course), and makes the entire movie a 50 minute testimony to one spectacular event. I'd really like to see the shipwreck part of it again, but can't possibly stomach rewatching the extraneous love story.