Almost like in the pirate game, we've hit a sort of stalemate -- three against three -- and I know in some rule sets for this type of game, that means the bad guys have won. But if no one else objects to playing it out to the end (and since that rule wasn't established at the beginning), we can continue on and see exactly what happens. :)
In general, though, how would people feel about such a rule in future games? That leans things a bit in favor of the villains, but not unduly so, I think.