I think all eyes are now in Bayer Leverkusen after the departure of many key players but also because there is still interest in some of the remaining ones like Granit Xhaka from Inter Milan for example.
Now Eric Ten Hag was able to recruit few players that replaced those who went out of the team, yet some positions have only one player and depending from the strategy he will adopt, there will be difficulties in case of injuries. This problem should be taken in consideration because the upcoming season will be harder than the previous one.
I doubt Erik ten Hag will be successful with Bayern Leverkusen after defeating in the pre-season match against Flamengo-U20 over 5-1, indeed as pre season match but the opponent teams as dominance by youth players how easily Leverkusen conceded until five goals. Upcoming season very difficult for Erik ten Hag not only several key players departure but also the rival teams Bayern Munich prepare team quit well after success signing several important players.
Erik ten Hag have one key player remaining Granit Xhaka but still not enough if want keep the higher standings finish for next season, Leverkusen need to sign several top players again exactly have much fund after selling Jeremie Frimpong and Florian Wirtz to Liverpool. I think sold both players more enough fund for Bayern Leverkusen if want signing two or three top players with market values around 60 million euro.