This is probably the last big (kind of) exclusive we will see on the Wii so I guess they figured they would go out with a real eyepopper for cover art.I actually like it. Probably good from a marketing stand point too ... your eyes will go straight to it when you see it on a wall with a bunch of other Wii games.
I think if I ever was involved in a retail game market/distribution I would insist that the game has a bright yellow with maybe a little bit of black for the cover art ... and the game would have to start with a letter between C and N so that it sits up there next to the maddens and call of duties catching everyone's eye. I wonder if marketing types in the game industry think about this stuff when they make cover art / come up with game titles.