Especially when demand for Versus XV is nowhere near as high as vocal groups want to believe (spare me of links to those shitty petitions with paltry numbers of sign-ins).
Square Enix have more than plenty of things to worry about, pandering to a certain unreasonable fandom isn't and shouldn't in their top priority. Versus XV will never, EVER happen. No amount of waiting for year 2099+, straw-grasping, and chanting for it will change that.
Look forward to DLCs, road map updates, and the inevitable FFXVI from this point onwards.
Oh this Versus XV thing, from what I've heard it's meant to be a "sequel" while at the same time being a remake, so pretty much
FFXV to Versus XV-1 to 3. Versus XV will practically be the Type Next sequel to FFXV if the rumors are to be believed(Going to be tied back to FFXV's ending, so the ending will still be canon, but I'm guessing it's going to deal with whatever happens in the afterlife like AU or something? I'm guessing that's the case then I'm going to assume after the 3 game of this supposed happening game, it will go right back to Noctis and Luna's wedding where the Chocobros show up at some point)
The demand is mainly from XV being popular and the fastest selling FF game in history, the Versus XIII fanboys would practically have nothing to do with it being made, it would simply be due to them capitalizing on what made FFXV popular(the Chocobros, Noctis Warp Striking it's action combat(granted if Nomura is directing then expect it to be KH for grown ups), and making 3 games out of it(If this rumor is to be believed Nomura's original trilogy story) and adding Versus nostalgia to it simply because they need to differentiate it from FFXV. FFXIII's sequel problems were more to them being shit than them simply being sequels(They weren't received as well). They also won't have to create assets from the ground up which they will hopefully do for FFXVI, don't want Noct's powers used for every protagonist. So they can practically squeeze whatever they can out of FFXV by doing this.
Average consumers will be none the wiser, they will probably buy it if it's good, if not better than FFXV, I mean I hope a Versus XV is better than FFXV or else damn that would be terrible(No this has nothing to do with Nomura possibly being the director of this possibly happening game, it's more to do with learning from FFXV's faults and not repeating them, Tabata can do the same thing)
This Versus XV is practically FFXV-2 which instead of resulting in a FFXV-3, it will end in a FFXV-4 taking place between Noctis killing Ardyn to his afterlife wedding(Which takes place in an unknown timeframe).
Think of Versus XV as how do we get Final Fantasy XV-2 to sell well.