If they want to merge they have to have the pilots support which gives the pilots something they haven't had in many, many years...leverage.
If I were in charge I would cherry pick the best work rules and ask for the highest pay between the two companies, then I would merge the mainline lists on a percentage basis respecting wide body and narrow body differences (this is a little more difficult than I make it sound, but doable). Further I would merge Comair, Mesaba, and Compass onto the same list stapled to the bottom of the mainline list and scope out any additional outsourced airframes. All existing contracts will be honored but any additional flying within the DeltaWest system would be flown by DeltaWest pilots (crazy concept, eh?).
Notice I wouldn't ask for a large pay and benefit raise, but I have set up a contract which will give the pilots a lot of leverage when it becomes amendable.
Oh, and free valet service.