I doubt Xabi Alonso's Leverkusen can dominate the Bundesliga next season. Leverkusen cannot win the title by going undefeated for a whole season. If Leverkusen wants to dominate the Bundesliga next season, Leverkusen management should definitely try to strengthen their squad. We saw the Napoli team dominate the 2022-23 season and win the title. However, last season we saw this team finish tenth in the table. So Leverkusen will have to play very carefully from the start of the season if they want to win the title.
There won't be too many expectations from Bayern Munich next season. Bayern Munich have a strong squad but new coach Vincent Kompany is not experienced enough. I don't know why Bayern Munich have appointed such an inexperienced coach.
Just like you, I personally also doubt that next season Leverkusen will be able to do what they are doing now, Leverkusen can perform optimally at the moment when indeed Bayern Munich is not in good condition and it is difficult to maintain their dominance this season, Leverkusen performance this season is of course supported by the even quality and depth of the squad they currently have,But reportedly currently Leverkusen has sold some of its main players to other teams and of course it will affect their performance next season, Leverkusen of course needs additional new players for them to recruit, especially now that Bayern Munich and other teams are starting to actively strengthen their squad for next season.
Precisely I think Kompany will be able to surprise us next season, Kompany has done a good job at Burnley before by making Burnley promoted to the English League, but indeed the relegation of Burnley is quite unfortunate but we all can't blame Kompany because indeed he does not get the support of the club by recruiting good players to be able to compete in the Premier League, But now by handling a team full of stars, of course, it is likely that Kompany will be able to maximize all his abilities in coaching and bringing change at Bayern Munich next season.