Here is a list of the exclusives depending on where you get it from:
"Speaking of Paramount, we've just learned that there are a whopping EIGHT retail exclusive versions of Iron Man available today on DVD and Blu-ray. If you purchase the DVD at Circuit City, you'll get access to an exclusive Marvel Digital Comics featuring the artwork of Adi Granov. At Best Buy, you'll get a custom lithograph created by Marvel artist Gerald Parel. Target features "exclusive Mark III" mask packaging on both the 2-disc DVD and 2-disc Blu-ray. At Costco, the 2-disc DVD includes a trio of bobbleheads. At WalMart, the 2-disc DVD comes with an exclusive comic book, while the single-disc DVD comes with a bonus disc containing the first episode of the new Iron Man animated series. FYE and Suncoast stores are offering the 2-disc DVD in exclusive Steelbook packaging. Finally, at Borders stores the disc includes a collectible book of original sketches by Bob Layton. Whew!" -thedigitalbits.com
I picked mine up from Best Buy and got the lithograph.
