EA games, especially the sports games, will be great but only if they are supplemented by other exclusives that appeal to the same audience. The N64 was the last traditional console from Nintendo that did really well in the West because it had exclusives that appealed to western crowds, which supplemented third party games like FIFA, Madden etc.
Can Nintendo find their next Goldeneye, WWF No Mercy, Wave Race etc? If they can build an audience for those games they will do well in the west.