DC has revealed their March variant cover theme: each variant that month will be based on an iconic movie poster. Bill Sienkiewicz draws a North by Northwest-inspired cover for The Flash #40.

CBR has collected a gallery of all the covers released. There are some great choices here, like Green Lantern in the style of 2001: A Space Odyssey, and some odd ones, like Justice League Unlimited in the style of Mars Attacks.