He'll stay here. Unless there is some unwanted ownership interference that will make him think 'why am I bothering?'
However, you would hope that the work done so far means that will not happen.
That leads me to think, if we stay in contention at the top of the table, surely the sale of the club becomes likely. It would be typical for the Lansdowns to sell to someone who then undermines Nige and he jumps ship.