Thing is, that's precisely the opposite of what would happen. There's a very good chance that if this Super League goes ahead, it will be a massive success. Even if it's wildly unpopular with fans here, it will be wildly popular with the foreign fans who bring in huge TV revenue, and it will be wildly popular with BT and Sky (who will likely not be forced to bid against each other) for marketing to the domestic armchair plastics who will lap it up. Then what you get for your refusal of the invite is consignment to the kind of level we were at before, only forever this time. On the other hand, assuming that fan power does bring down the competition, you can expect that the fans of the other clubs who also campaign against the league will pat themselves on the back for doing the hard work and City would get no recognition for refusing the invite - not beyond a week or two of positive press, anyway. Within the month City's part would be forgotten and it would be no net gain at all.
I hate it, but trust me - there is nothing to be gained at all by our board refusing to participate unless all of the other clubs look to be refusing too. On the other hand, it is our job as fans to throw up a wall of opposition, the same way that the 39th Step got shot down a few years ago. If we ourselves were to start the outcry against this, it would probably generate a lot more positive press than the club themselves rejecting the notion of their own accord, because you can bet that MCFC on their own will not be enough to bring a stop to the plans.
So...anyone for starting a petition, I guess?