Ah, well. I was a Ghirahim supporter, but I didn't, and still don't think Zelda's getting six characters. Lame that we're probably getting the same ones we've had since Melee, but pwagh. I kinda see all the Zelda love in the items/assists/stages as compensation, and I'd say it's working well enough.
Plus, If Ganon gets a new moveset, though, I won't even mind, he can be our newcomer.
Also, about Impa. With Sheik being separate from Zelda, I don't see it happening. Except for the one in the old games (who didn't ever do anything to the point you couldn't even freaking see her in-game) they're pretty much the same character type. It's not that they'd be clones or anything, they can definitely have different movesets, but everything you can do with Impa, you could have realistically done with Sheik too, and I doubt Sakurai would choose that over someone with completely unique moveset potential that couldn't have been done with anyone else.
Also, I'm choosing to ignore Hyrule Warriors Impa because let's face it, as cool as the character designs are, it's a freaking spin-off. You wouldn't use HW Impa (or that Ganondorf for that matter) for the same reason you wouldn't replace Link's bow with a crossbow. Heck, was HW even a thing before they started with development?