Although Bayern Munich won the German league title in the previous season, their journey to win the title was quite difficult and in the previous season, despite their many efforts, they could not overtake Leverkusen and they lost the German league title to Leverkusen. Bayern Munich may not have to compete as hard as they have in the last two seasons with the teams number two and three in the point table this season. This season, I do not think the Leverkusen team is strong at all and their current manager may be responsible for the poor performance of this team. Leverkusen, Leipzig and Dortmund may not be able to compete very well in the next season, so it is relatively easy for Bayern Munich, the best team in the league, to retain the German league title next season.
At the end of last season, Bayern Munich's points gap with Leverkusen was 13 points. This indicates that Leverkusen hasn't been consistent in their title fight. Moreover, with Leverkusen under a new coach this season, we're not so confident they'll compete strongly with Bayern Munich.
However, Dortmund, Freiburg, and Eintracht Frankfurt have all made significant progress in terms of their strengths. I believe Bayern Munich won't have too much trouble beating their opponents, as they have Harry Kane, who can make an extraordinary contribution in every match.