Why would you worry about Wizz moving?
It's getting to be nonsense now to be honest with you. They have no desire to leave from what we can read about it, They have grown remarkably and are happy with Luton yet because STN has been sold all of a sudden they will want to risk everything and hop out of LTN in a heartbeat for no reason.
Do they want to risk going head2head at Ryanairs home base? Nope.
Do they want to pay higher fees? Nope.
Do they require a longer runway? Nope.
I would even argue most of their PAX are based in LTN and the surrounding area.
So why are they going to leave? I am intrigued..