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.
It's different with Napoli, they couldn't defend the Serie A trophy because the coach resigned and Napoli changed to a new coach. This is very different from Leverkusen, which is still being coached by Xabi Alanso and it is very likely that Leverkusen will also bring in several new players, so in my opinion next season Leverkusen will continue to dominate the Bundesliga even though they will not be able to repeat their unbeaten record, but I am sure they will be able to defend the Bundesliga trophy next season.
Moreover, Bayern Munich and Dortmund will start the season with new coaches, of course these two teams need to adapt so that the team becomes solid and strong. You yourself doubt that coach Vincent Kompany will coach Bayern Munich but you also doubt that Leverkusen can defend the Bundesliga title next season.