I still feel very strongly that doesn't make a difference. It looks cool and all, but all you're doing is Photoshopping and saying "Look, this is Ninten!" and at best creating an alt. Anyone can Photoshop the hell out of a character, but you're not changing the canon. And commercials with real-life actors were never canon either.
I could just as easily be arguing for OoT Link to be a separate character, then photoshopping him to wear different equipment, changing his hat, and changing the outline of clothes and being like "hey, he looks different enough to be a different character now!" Somewhere in the whole process, I'd forget that all along, I was creating a fan design and that you can't change the original.
Finally, appearances aside, there's the whole issue of just his moveset. Remember that there are two types of characters we can have:
1) Unique character, requiring hundreds more hours of work and balancing -- Best reserved for the MOST WANTED characters
2) Clone character - with limited changes.
Ideally, he should be a clone, if anything. I mean you want to "complete" the Mother trio. But he's being billed as a unique character with a completely separate moveset. Is that going to be worth it to push out Isaac, Ridley, and characters like those? Will he generate enough hype to validate 800+ hours? I don't think so. I can't even say if he does among Mother fans (outside of the few we have here). Unlike Lucas or other Mother characters, Ninten is essentially a Ness precursor. He does not add anything big or new to this game. As a Mother fan myself, I feel 0 hype. If I saw a trailer with Ninten, I would be like, "Wow, they put their time into that?"