An ongoing project by illustrator Peter Stults which imagines contemporary movies if they'd been made in earlier times... http://bit.ly/wzj7Kf
I'm pretty sure Muhammad Ali would have been Cassius Clay at that point, but still, handing the Tyson role to him was pretty funny.
I would love a print of the avatar one and I've never seen avatar. My favorite of them all was the 5th element. His fake criterion collection covers are really great also.
Oh yeah, his are the best! That started a couple of years ago in a MUBI thread (at the time the site was still called The Auteurs) and is still going. And of course there are a ton on Tumblr.