A look at the environment for companies today suggests a Spinoff instead of a sell. Really what company can cough up a cool 6 billion for the acquisition of the ISGS business unit.
Lockheed would also be stupid to sell off ISGS vice a spin, because divorced from the excessive overhead rates ISGS will become competitive again. The problem is that the corporation as a whole is totally bloated and set to manufacture items instead of being a serviced based organization. Corporate flowdowns are killing ISGS, so being out from under them should help ISGS win contracts.
Rumor is also that they'll look to do a reverse morris trust to merge ISGS with another company and avoid some tax burdens...
My money is on a spinoff instead of a sale.