My pick is... iPod Wear (or at least iPod xxx). My pick actually surprises even me, because as I've been hearing the iPod branding discussion for the wearable, I mostly dismissed it becasue a) iPod brand is fading fast and b) it seems too radically different from a music playing device to a wearable.
However, my reasonings are as follows: Apple likes the iPxxxx branding and I can't for the life of me think of anything iPxxxxx for a werable. Despite the fading iPod brand, it still has a huge name recongition for Apple.. even almost nolstagic for the device that brought Apple back to relavance (and the iPod Touch definitely isn't going anywhere for a while). iWatch doesn't seem appropriate because the watch is likely 5% of functionality (yes, you could make the same argument for iPhone, but basically everyone has a phone, very few people still wear a watch. That would be a losing battle from the start). iBand just doesn't sound right; can't really pinpoint it, but doesn't seem likely.