I'm still trying to figure out if Lucina is a clone. If she were an alt skin, I doubt she would've gotten her own roster spot on the official site, but at the same time, her video and pictures show nothing that separates her from Marth. Her moves are the same, her idle's the same, evne her jumping and dashing animations look the same.
So, if clones are in, does that open up the possibility for more similar-to-their-more-popular-counterparts characters? Could we potentially see more Fox clones, or Dark Pit, or a Melee veteran returning? DLC could be easier to produce, as well, if they choose to go that route, if they don't have to create entirely new movesets and animations for any new characters.
I don't think I've ever been this excited for the possibility of clones before.