Owners of CVT have said a few times that they would prob. sell the airport if/when they get a new terminal. I would imagine an airport without a terminal or at least planning permission wouldn't be worth an awful lot. I wouldn't call the current portocabin/bodged old building arrangement particularly long term.
They currently have a new application in with WDC for a terminal 3 times the size of the one refused last year. It'll be built in phases, apparently. It has yet to go before WDC's planning committee - there's a surprise, WDC seem to take their time over these things.
www.wdc.gov.uk