Half people who don't want another "anime swordsman", and half people who don't want music from the Dragon Quest composer in the game due to his Twitter outbursts about denying war crimes and such.
I love Dragon Quest as a series, and I think getting the franchise in would be pretty impressive. But I strongly doubt we'll be seeing it because I just look at how tight-fisted Square was about Final Fantasy and I feel like it would be such as low blow to fans where we didn't even get Spirits for the Materia, but we're getting music from a homophobe who said Japan was in the right for taking American women and turning them into prostitutes for the military during World War II. In other words, if Dragon Quest gets more than 2 tracks, people would be VERY angry. Even if all the tracks were remixed by new composers, people would still get irritated because it's the internet and the internet finds everything to complain about.
And, this is where I'm looking at about the music we're getting. Now, for Joker, it's a very safe bet it's just going to be for Persona (and, most likely, just P5 music), but if we get Erdrick and we're stuck with the two track minimum for a Dragon Quest stage, what else could we get as filler for other stages?