The SSP agreement promises the aircraft, but it would be a stretch to say they owe them 7 years of pay. This is from the SSP. All Delta has to do is find a reason to terminate the DCA. And if the terminate the DCA the SSP is terminated as well.

The commitments in Section 1.a.-b. will terminate and shall be of no further force or effect upon the earlier of: i. the termination of the Delta Connection Agreement between Delta and Pinnacle (“DeltaPinnacle DCA”), as may be amended from time to time, that governs the operation of the aircraft subject to Section 1.a.-b., in accordance with its terms so long as Pinnacle, or its successor, is not an affiliate (as defined in the Delta PWA) of Delta Air Lines, Inc