Bayern Munchen and Dortmund have changed managers, Xabi Alonso can make good use of this as a convenience, to help his squad retain the Bundesliga trophy next season. Amid increasingly high expectations for Leverkusen, it is possible that they will slump, so that Bayern Munchen will take over dominance again. So far, Xabi Alonso has still been able to keep most of his players from leaving, and Leverkusen is also trying to add depth to the squad by recruiting new players such as Aleix Garcia.
To repeat the unbeaten record throughout the season, it will not be easy, and requires great luck. What is more important is to defend the title, and try to appear consistent in every competition they participate in. Xabi Alonso doesn't seem to be losing his magic so quickly, his chances of leading Leverkusen to success are very open. Personally, I am quite curious about their journey in the Champions League next season, apart from various assumptions, I think they still will be able to talk a lot next season
A change of coach can give rise to two options, either the club's performance will be better or it will experience a setback from before. If you look at the coaches recruited by Bayern Munich and Dortmund, the potential for Leverkusen to retain the Bundesliga trophy is a little more open. The reason is because both coaches are not experienced enough to handle big teams like the two of them, while Xabi Alonso has very strong and solid strengths.
I don't think Leverkusen will be able to achieve an unbeaten record again next season and that is something that is difficult to maintain. But in terms of the title or finishing in the top three, Leverkusen still has a chance as long as Xabi Alonso can make his team play more consistently like the previous season. Next season Leverkusen will also play in the Champions League so they will have a busy schedule with much tighter preparations to take part in this competition.