Had say, ComStar or FedCom somehow manage to form Star League, what would the effects be on Clan culture and politics once they invaded?

This isn’t really at all a likely hypothetical, but it’s one I’ve been wondering. Maybe ComStar works toward manipulating the Great Houses to weakening each other, all while using the HPG network to increase their influence and the latter’s reliance on them. Maybe FedCom rises earlier, using its combined might to first annex most of the Capellan Confederation before warring with the Draconis Combine, winning and leaving the remaining three houses too weak to form an effective resistance once they do ally.

If somehow this Star League survives and House Steiner-Davion becomes the new First Lords, what would be the reaction of the clans? If the Dragoon Compromise occur, how much of the new info would Clan Wolf share? Would the Nova Cats do what they did similarly IRL? Contacting the Star League to join it or even abandoning Clan space to migrate? What about the Crusaders? If so much of their ideological drive proves fruitless, how would they perhaps fracture?