They should hold it till next spring and then air it as a special, leading in to their Defiance
series premiere. NBC did that with Mockingbird Lane
, and it apparently boosted Grimm's
They may be able to make some money with a DVD release, but then it's gone. Using the pilot as a PR boost to an ongoing series is an investment in the future. Of course that assumes Defiance
appeals to the nuBSG audience...