Last E3, that is, E3 2009, two unique IPs were demonstrated in Nintendo's booth. One was FlingSmash, which is seeing its release this upcoming fall for a reduced price. The other was Line Attack Heroes.
Line Attack Heroes is an action title in which defeated foes join the hero in a line which can be whipped out with a swish of the Wii Remote. Furthermore, getting more heroes to help you out increases your power, allowing you to fend off more powerful enemies. The game has a complete story mode, with cooperative play available, and if players want to fight each other, there are four distinct multiplayer modes, as well.