Wizz are investing more behind the scenes at LTN with more increases in frequencies next year. I doubt they are going anywhere.
When the new owners arrive at STN, they will find it hard to attract anyone in the current ecomonic climate, if there is anyone left other than cargo & RYR.
Money talks and the new owners will want to see a quick increase in business, just like LGW I would expect to see plenty of "incentive" deals on the table. airlines are mercenary and will move for cash especially LCC's
that said until it happens it is all supossition