In: Sané (65M€), Perisic (5M€, Tolisso in trade), Dayot Upamecano (40M€), Sergiño Dest (20M€)
Out: Tolisso (Perisic's transfer), Sven Ulreich (to Hertha BSC, 3M€), Coutinho (he'll go on loan to Tottenham imo), Chris Richards (will go to Chelsea for 2M€ imo), Christian Früchtl (on loan for 2 years, Werder Bremen)

What about:
Havertz - will join in 2021
Jonathan David - I'd like him to join but I don't think he'll join this year, so maybe in 2021
Alaba - Is going to stay imo
Youngsters: I think some of them will get a chance next season (Oliver Batista Meier, Joshua Zirkzee)