It is even unlikely that Bayern Munich will be able to get Harry Kane because recently I received news that Spurs have rejected the proposal made by Munich for a fee of 70 million euros. I don't really know if Harry Kane really wants to stay or if management forced him to stay. But with his long journey with Spurs but not being able to win any titles, I think all players would prefer to leave and join another club that has great potential to win some trophies. Kane has one more season left with Spurs, if management doesn't sell him immediately then it is undeniable that he can leave as a free agent when his contract expires and this is a big loss for spurs. I'm not so sure that Spurs can convince him to sign a new contract.
I agree, that is definitely not sure yet if Bayern Munich will be really able to sign Harry Kane. The fact that Tottenham Hotspur basically immediately rejected the offer of Bayern Munich does mean nothing though. Bayern has offered them 70 Million € which is just not enough for Tottenham. Reports say that they want 100 M pounds for him. That was just the first offer of Bayern though and in the end the fee will be somewhere between 80 and 100 million i would guess.