Flick confirmed a talk with Gündogan yesterday, but he didn't say what about and he also said he believes he will stay. I think Gündogan wanted to make sure about his role this season because of Olmo's signing. If Flick plays his usual 4231 Gündogan knows from the German team of course, Olmo/Pedri are planned on the 10 behind the striker, only 2 pivot positions are left in midfield.
It'll depend on Flick if Gündogan will stay I believe. He wants to be useful, he doesn't want to sit on the bench yet. We'll see in the next 2 weeks, if Flick was able to convince him to stay.
I hope he stays this season. He's still world class. You won't win any titles with Casado and Bernal yet.