No. They aren't.
Japan is bitter about Mewtwo's exclusion and believe Zoroark would cause Lucario to get the axe as well, and they don't want that. Zoroark is expected but not wanted or desired.
Prove to me that Zoroark and Victini aren't in anywhere near the top 10 most desired potential newcomers that are Nintendo-owned. Again, we haven't gotten much opinion from Japan, and Japan makes up maybe 1/8th of the sales of Melee/Brawl. Don't use Japanese smasher's opinions as the end alls.
Japan's smash bros fanbase that we have access to don't seem as "into" smash as us here on smash, and honestly, I don't think they will really care about these upcoming games until after a game is announced. Probably most of the smash community and smash fans feel that way!
Overall Japan has given minimal opinion on smash, other than they want Mewtwo and Roy back. That isn't a heck of a lot of insight. It also hurts that most Japanese sites IP Block non-Japanese computers.
Mewtwo isn't a newcomer, which obviously I didn't include in my rough estimate of the "top 10" (or so) wanted potential new playable smash characters that are Nintendo owned.
Japan also has little to no views on Victini being a Smash character. Most of Victini's support comes from outside Japan,
There is next to no potential newcomer support in Japan. All they seem to care about is Roy and Mewtwo, for better or worse.
Again, Japan is maybe, MAYBE, 1/8th of Melee and Brawl's sales.
There is currently one Pokemon that is not only wanted worldwide, but in the Top 10 worldwide, and that's Mewtwo, a Melee character.
Japan is a minority of the smash bros community and sales, not the majority (the majority is NTSC, BY FAR!). Mewtwo is a veteran, and not what I'm debating over.
Again, this delves into the candidates, of which I am making a video for with their evaluations.
How many candidates are there=??? As much as I hate to say it, I definitely see Waluigi being a playable in a smash bros game a few titles down, due to Nintendo running out of characters. That is, unless smash heavily increases the amount of retro/WTF/3rd party characters.
EDIT: Furthermore, only Lucario was pushed upon by the Pokemon Company/GameFreak. Sakurai used his own judgement for the others.
Popularity pushed Mewtwo most likely. Why wouldn't that happen with a new Pokémon=??? Again, there are minimal potential newcomers with more popularity or speculation discussion as Zoroark or Victini. You could argue Ridley, Dixie, and K. Rool are as big if not bigger Nintendo-owned characters, sure. After that, there is a whole lot of drop off.