Lets say Phantaria continues the fight and Astrum send in troops. Asylon would not be far behind in striking Astrum, thus pulling Astrum from the Terran field. In that scenario, and with D'Hara and Farronite, in say a less than desired level by the theocracies, this could turn into a huge melee by lots of powers.
You think Asylon is going to go alone against a crusade? I don't see any way in which Asylon gains from entering the conflict, at least on the side of Phantaria. We asked them for weeks to join our realm and instead they turn around and attack Terran. They have what is coming to them.
