As usual, Destructoid.com had the best piece on it:
EA confused that a couple of their games didn't sell
OK, John, I've got the answers you've been looking for. About Dead Space Extraction; it's not that strong of an IP, it's not one of the best pieces of software built on the platform, and it's an on-rails shooter. If Dead Space had the same kind of fan-base as Resident Evil, and if Dead Space Extraction couldn't be completely finished in under 8 hours, and if on-rails shooters were a popular genre, and if the Wii wasn't already flooded with those kinds of games, then yeah, maybe you'd have a point. It's also worth noting that Wii games that try to copy Hollywood action/horror movies usually have a tougher time than those that are more "game-y". If you want to make a "core" game on the console, you might be better off going the No More Heroes route as opposed to Disaster: Day of Crisis.
http://www.destructoid.com/ea-confused-that-a-couple-of-their-games-didn-t-sell-156834.phtml
nothing else to add.
