The structure of Bayer Leverkusen next year is very, very important. They will play with a new coach and the players will need to be in harmony with him. They should complete the transfers quickly so that the new transfers can contribute well to the team. Their return to the championship in Germany depends only on perfect planning.
Of course, the team will be strong in the market for signings any kind of player to strengthen their performance next season, but this team is not rich enough to buy any player they want in the market, they are not rich enough like Bayern Munich to buy any top their choice player, perhaps they want to sell their key players for a huge amount of money in order to buy some player to improve their performance, they will need a stronger defense because they conceded unnecessary goals last season which prevented them from winning a trophy.
However, I've heard a rumor that Ten Hags has added Manchester United Antony to the list of players they plan to sign for the next season. As a manager who always wants to be reunited with his former players, I hope Ten Hag signs Onana as well. Manchester United fans will be satisfied to see the deal done because Onana has been their problem ever since he joined the team.