I think this book is gonna make waves as it settles, and while some may be turned off by the lack of what they're used to, it'll only strengthen Peach Momoko's identity for the book. Often times we already have the lore for mutants and the X-Men established, but what happens in a world without all that? When there are so few mutant characters we now pop into someone's life as their powers emerge? With no current guides as far as we know? All that possibility makes this fascinating, and the beautiful artwork combined with the folklore inspiration truly serves to make this an X-Men unlike any other.
The word “mutant” doesn’t appear in the earth 6160 sections of Ultimate Invasion and the Ultimate Universe One Shot. We know that there’s fewer mutants and the ones we know of aside from Storm are working for the Maker’s council.