I think the journey of bayern munich to defend their title is much easier for next season it because bayern munich will not gets decent opponents to fight for race title and why i am saying that because leverkusen as their strong opponent in the last 2 season is not strong anymore especially next season leverkusen lost Xabi Alonso and some of their key players such as Jonathan Tah, Jeremie Frimpong and the latest is Florian Wirtz which more likely will go to Liverpool so my prediction is leverkusen next season will struggle to find their consistency and i would not putting them as the candidate of the title
Don't just focus on Leverkusen as Munich competitor remember Bundesliga still has Dortmund, indeed this season Dortmund has not shown significant improvement but we don't know what they will do next season and usually Dortmund brings something different every season for example new players who shine. You know Sehrou Guirassy is one of Dortmund players who is attracting attention in the Bundesliga he is only 5 goals behind Harry Kane who knows next season he can take Dortmund to a better place.