Delta will have to re-evaluate the hardline stand they have taken in regard to shutting it down if it's a no. The other regionals are not cheaper or "lower bidders". This will likely cost them long term if you call their bluff, just remember they need you to fly those airplanes for street walker wages in order to start reaping the profits.
A modified TA acceptable to the Pinnacle pilot group would be offered before things really go south.