For your viewing pleasure, here's the official Japanese "poster art" for Rockman 10 that was revealed during a recent press conference. It's perfect wallpaper size, too, so have a look:
The illustration will be used in future promotions such as a mock game package for the forthcoming "Rockmanju" candy, as seen below:
Thanks to Jimb0 for the tip!
Sources: Dengenki Online, 4Gamer.net