The big issue with Kane leaving is that he has 3 years left in his contract. With that, Levy won’t sell for less than 150M. City won’t go that high and there’s no other suitors.I don't see how any result on Sunday changes the fundamental dynamics of the situation, which are that Kane wants to leave, Kane is willing to signal that openly (as he has already) but won't totally throw his toys out of the pram by refusing to play for Spurs or submitting a formal transfer request, and that without Kane forcing his hand Levy won't sell him at a price that City will pay.
Kane will be at Tottenham this season (next year when he’s down to 2 years, Spurs will still get a decent price, but it will be one someone will be willing to pay unlike now). Levy has too much leverage and too much incentive to keep him.
I think they sell next year and, depending on how this season goes, bring Poch back and start a rebuild with the money.