Luckily, the entirety of the roster hasn't been completely revealed, as there is clearly still room for five or more slots, so they very well could reveal a few more.
He's not allowed to be dissatisfied?
I believe one dissatisfied post is sufficient to clearly communicate one's distaste. Bitching about it isn't going to change anything. But I think that we're all jumping the gun a little bit here anyway. Who knows what sort of DLC Nintendo could have up their sleeves. This is their crowning glory for the Wii U so I'm certain that they will be doing everything in their power to draw out the hype.