Cape Rail is one subsidiary that would be held intact as a bargaining chip, for these reasons:
1) Cape Cod Central RR's excursion service is profitable. Not the most profitable New England excursion carrier (that's Valley RR and Conway Scenic by a country mile), but they're safely in-the-black with patronage on a long-term upswing.
2) Mass Coastal freight's energy train trash haul contract with Commonwealth of Massachusetts guarantees the carload counts over life of the contract. All of the Cape's garbage truck loads end up as MC carloads, so the business is as constant as the in-season + offseason population of the Cape. Term-of-contract is still several years away from needing renewal or re-bid.
3) IP has a new long-term contract for dispatching and various MOW services on all the MassDOT-owned non-passenger lines in Southeast MA. Another fixed revenue source for them like the freight contract. They've gained lend-lease access to MBTA MOW equipment and Keolis lease power as a perk of that deal, which gave them the bandwidth to send CCCR/MC's loco fleet out for complete overhaul in 2015.
4a) MassDOT is upgrading the two state-owned branches that bring CSX from Framingham to the Mass Coastal interchange in Middleboro to 286K loading weight (Framingham Secondary work now in closeout, Middleboro Secondary work beginning this summer, NEC connecting trackage Mansfield-Attleboro already uprated). IP has the construction contract for performing the on-the-ground upgrade work (so far their handiwork of the Framingham Sec. looks pretty spiffy). All part of a longer-term MassDOT installment plan to bring 286K through MC territory to ports of Fall River & New Bedford as an IOU to CSX for the 2008 branchline sale and operating rights package, so that MC can generate more business for them at the interchange. The most expensive parts of those South Coast branch uprates have already been paid for with major bridge replacements in New Bedford; future installments will pay for rail/tie replacements that finish the job. Both ports also have planned dredgings for bigger ships due to take place over next dozen years.
4b) State has ~$50M in programmed funds FY2017-2021 for upgrades in Cape Rail territory on the Middleboro-Hyannis main, Falmouth Branch, and Yarmouth freight stub. Yard reconfig for CCCR/MC in Hyannis, MC in Rochester at the trash-to-energy plant. Rail/tie, speed and crossing upgrades on the main and Falmouth Br. for Cape Flyer and the excursion trains. Major bridge replacement in Wareham. IP is very likely to get this MOW contract if closeout on the CSX branch upgrades proceeds without incident.
5) Likely bidding war for acquisition. Grafton & Upton RR's owner nearly bought a controlling stake in Cape Rail prior to IP's involvement, before the deal fell through over some details. And Seaview, the shortline and truck logistics company that runs the terminal RR @ Quonset Point in Rhode Island, is in acquisition mode. They bought the Newport Dinner Train in 2015 when the original mom-'n-pop owners opted for retirement. The ports-to-CSX and trash train fit Seaview's freight biz model for 'captive' terminal switching, CCCR and Newport have obvious synergies being in the same regional tourist market, and they've taken on maint outsourcing for the T @ Quonset Point so have capability of taking on some of IP's outsourced dispatch and MOW tasks.
So if I had to guess all these contractual tendrils with State of MA for guaranteed carloads & work plus full-funded upgrades on their turf give the Cape Rail subsidiary a level of business certainty worth firewalling by keeping full-staffed...while other IP reporting marks around the country get hibernated during the crisis. Either CCCR/MC become a prime bargaining chip shaping a bankruptcy reorg, or it's a sell-high showcase piece in a company liquidation given the high likelihood of multiple aggressive local bidders egged on by MassDOT to take the whole thing.