https://www.transfermarkt.com/kevin-de-bruyne/geruechte/spieler/88755
What do you think about Manchester City in case he leaves this summer? Would you expect them to have bigger problems on creativity? Honestly they have such an amazing squad that I don't feel like they will lose a lot of power. De Bruyne's absence would be felt for sure but I think Guardiola would find a way to balance the team. He is a smart guy. They have lots of money to spend on another great player also to fill De Bruyne's place at the same time.
Sooner or later he is going to leave. He is already 33 years old. I don't know how much longer Guardiola would like to see him in his team. Because after a point his performance will probably start going the opposite way.
Other than that of course he is an amazing player. His creativity is surely making a big difference for the team. But there are always good players in the transfer market. It shouldn't be impossible for them to fill his gap. Besides Manchester City are a team not relying on a specific player which is the most important thing. This would be more helpful for them to deal with his absence if he leaves in this transfer window.