League wars are a bit weird at the moment. At least in my last game. I played Russia, so I didn't really care, but this was the Catholic league:
Everyone in the HRE excluding 2 protestant electors. For some reason even reformed Switzerland was in there.
This was the Protestant league:
France, Great Britain, Denmark-Norway, Commonwealth, Naples-almost-Italy, Hungary, Ottomans., Spain ... I did NOT want to be the pope (only non-HRE catholic member) or the Habsburgs at that time. Anyway, almost NONE of the protestant league was, well, protestant.