Dortmund can not be trusted when it comes to winning trophies or challenging Bayern Munich for the title for next season because they are not ready to win the trophy from the way they are focusing on business, they struggled last season in the league but they were focusing in the champions League no that they want to another season they are supposed to spend more on players but they will rather spend small amount to build and sell bask to other teams instead of using the players to fight for the trophies.
Ten Hag and Levekusen should focus on developing the team to a good squad if they end up having the opportunity to win the league ahead of Bayern Munich it's a good thing for them but the goal of the team should be winning a trophy not just finishing among the top4.
They don't usually get the opportunity to win trophies because anytime they get the chances they start performing weak, there patterns of playing are like Arsenal every season. they will start with good results later they will start to perform weak in the competition and make the fans feel disappointed. Bayern Munich will always be the favorite of winning the Bundesliga every season. Dortmund always sell many of there key players to other club, and that is why they usually strongly at the ends to win trophies every season. The more you sell key players in your team you need to replace them more with others. but Dortmund don't usually do so they buy small players to build up. and if you Don't have a better coach that can build players they will always suffer at the ends. Leverkusen as be in a better form and Erik Ten Hag just need to maintain the performance. But if he fail the club will go back to day one strongly again. Let see how the season will be. because every season we usually see some challenges and see small other clubs improve more better and challenges the big club to achieve the league title.