Great choice! I would also like to see Burroughs' John Carter on Mars series, but the biggest money maker would be "Space Willies" and Bruce Willis would make the perfect hero.
We should not forget the first ALIEN movie. That scared the hell out of me and I was an adult LOL.
I would also LOVE to see John Carter of Mars on the big screen... And speaking of the character, another movie that I think would be awesome would be Heinlein's "Number of the Beast." What a mind twister that book was, and I think that it would adapt itself quite well to the screen.
Mark