LOL, I was going to suggest Forbidden Planet as well, but I realized it may not work.
Walter Pidgeon was just AWESOME and although you could improve some of the effects and such, it just wouldn't be the same. That said, those posters were crap. I mean, there's another version of the poster with the likenesses of Walter Pidgeon, Leslie Nielsen, and Anne Francis on it, but they still show Robby carring a woman who was NOT in the film! He carried Anne Francis and they clearly were NOT the same person.
Stupid conventions of that time!
I also would say The Day the Earth Stood Still...but it's already being done and I'm apprehensive about it.
They've redone Omega Man.
I HATED F451 when I read the book, or rather read 1/3 of it and couldn't stand anymore.
Maybe Buck Rogers?