According to the press release, those who opt for the Family Play controls play without the nunchuk adapter and handle the key actions (e.g., shooting, passing, snapping, and throwing) while the game handles everything else. It sounds a lot like how Wii Sports handled tennis and baseball.
More fleshed-out and advanced controls are still available and can be used alongside a Family-style player. Let's hope the Family Play-assisted AI isn't too helpful and gives them an unfair advantage in multiplayer.
