One thing that ""bothers"" me at the idea of "Hisuian Zoroark" is how they would handle it mechanically.
So far when they've done regional forms, they've usually given them a distinct gimmick or special move (as with most new families in last generations), in some cases intentionally opposite to their base form, see Alolan Ninetales getting Snow Warning to mimic regular Ninetales Drought.
Zoroark however has Illusion as signature ability, so I am curious to see what this ipotetical "Hisuian Zoroark" will have. I don't think it'll be just "still Zoroark but ice type", probably will have some variant of Illusion that does something else.
(Also, still assuming it's Zoroark/Zorua, from the trailer it would appear they were not mimicking another pokemon at all, so their gimmick might go on something different than mimicking)