NickCrash

Well, I don't know much about the metagame, but I personally think that Hoopa Confined has a better typing than Hoopa Unbound.

Both typings are bad for defensive play, especially with all that Knock off and U-turn going around.

My train of thought is close to Tomas's bringing Greninja in mind, only this time the speed is not an issue. We will have to see and wait. Note that Greninja was fine till it got Poison Jab and Low Kick, and became an unstoppable powerhouse. I do not know whether Hoopa-u is far from this. Normal Hoopa seems okay.

I personally don't think that you can compare Greninja with Hoopa Unbound. Protean is abusable both offensively and defensively, and Hoopa-Unbound has a whooping 0 resistances, in addition to fairly inadequate speed that diminishes it's sweeping capability, despite it's nuclear offense.