This is why it makes sense to me.

What does Mesaba operate? CRJ2, CRJ9 and SAABs

What does Pinnacle operate? CRJ2, CRJ9, and SAABs (plus the Q)

PNCL has been looking for a CPA to place Colgan's SAABs at. We could be talking about an agreement where PNCL says "We'll buy Mesaba, but we want an extended CPA with more SAABs".

Just my guesses. We will see.

Good luck to all involved.