I would say nothing at the new DL is a sure thing to last except ATL. They are pitching a load of hooey over there about preserving all seven domestic hubs, but that would defy the rationale for absorbing NW in the first place, which is to create one more efficient network with fewer choices and higher prices. As the combined airline retracts to resemble the pre-merger DL plus some juicy Asia routes and a bunch of RJs serving captive midwest markets, I would be willing to bet you'll be able to hold Sunday afternoon drag races on MSP's main runway without disturbing ops.

If B6/F9/VX can just stay healthy while this retraction occurs there will be plenty of expansion opportunity.