Only Bayern Munich is not having any problems currently, and they will maintain the standard of the team or buy one or two additional players to add more strengthen to the team. Leverkusen has a new coach and some players are leaving the club, while Dortmund isn't in their best form and needs to sign more players to strengthen the team. I believe that Bayern will continue dominating the league.
At first, I still thought Leverkusen would be a strong competitor for Munich, but after they announced their new coach and some players left the team, it seems like it will be hard for Leverkusen to compete with Munich next season.
Maybe true, Munich will dominate the Bundesliga next season. When there is no competitor to make the competition more interesting, the Bundesliga can be boring.