Pretty great, right? For the first time, it looks like we have a cover image depicting a full-blown, four-man party of adventurers in a dungeon, locking horns with a dragon. We've lost the piles of treasure, but hey, you can't have it all. I immediately assumed this would be the cover for the new Player's Handbook, or at least a new starter set.
I assumed wrong. The 4th edition PHB ended up showing a pair of characters standing around and striking 1990s-style comic book poses, a motif that has been continued on the new PHB2. No action, no story, just posing.
And the dungeon-dragon picture? What became of it? Well, it ended up being used as the cover of a pack of character sheets. Yeah, those things nobody buys anymore.
Kind of sad, really.