That is only part of the big picture...

Delta is buying Compass, renaming them ASA (since the name is available) and buying ExpressJet from SKW in exchange for half of Pinnacle's 900s. Then Delta will change EpressJet's name to Comair, and spin off Endeavor after running them through another sham BK and renaming them Mesaba. Then Delta will sell the new ASA (formerly Compass) to Mesaba (formerly Endeavor, formerly PinaColAba) and shut down Comair (formerly ExpressJet, formerly ASA) because they hate the name.

This may sound confusing, but it makes perfect sense to the folks in ATL.