Originally Posted by
Kisinith
This may help a bit, its a breakdown of each of the known battle zones by association. I've highlighted the ones I know to have X-characters in Blue and the ones that probably do in green. Keep in mind these are my observations/guesses so take them with a grain of salt.
X-men Pretty obvious too many to detail.
Domain of Apocalypse (Age of Apocalypse)
The Monarchy of M
Sentinel Territories (Days of Future Past)
Mutopia (New X-Men)
Old Man Logan
Westchester (X-Men 92)
Limbo (Inferno)
Other
The Wastelands (?)
Arcadia (?)
Bar Sinister (?)