I have a hard time believing that ALL the Inhumans or ALL mutants will be involved. Your is basically every active Inhuman Vs every active X-Men related character. This is not a race war where Inhumans and mutants are fighting in the streets randomly, its not like they could tell one from another (tribal lines on the face or body might have been an interesting addition for NuHumans, even if just separate them from the mutant population). IvX is essentially The Royal Family and their followers vs X-Men. And not every X-Men ever or still alive. That'd be a bigger cluster @#@# than AvX, and I hope Marvel will never go down that path. I sincerely hope that they display the difference in opinions of people, that not everyone is going to take up arms for "the good of their people" in what essentially is one cause versus another. Ideologies should differ from person to person as much as it does in real life.