I only spent a few minutes so they look kinda flat.
Traditional SHUMP, except you have more of a 45 degree angle view. It lets you see the horizon, it also allows the game to move up and down as well as left to right.
This game would be controlled by the FHC (move it up/down to go to a higher/lower plane, left/right to move left/right, pull back on the controller to slow down or push forward to go faster). The face button is weapon change and the bottom button is fire.
First person tennis game. You move your player with the nunchauk, and use its tilt sensor to dive. You control your swing with the FHC. It matches the tilt of the controller (like guns in Red Steel) to determine the angle of the racquet, the velocity of your swing to determine power, then position of the FHC relative to a start to determine position of the racquet when you swing.
You COULD do two player split screen, but LAN/Internet play would be better suited.