I don't see any reason comparing Napoli with Leverkusen and using that to judge the future of Leverkusen. If I must let you know that Napoli had problem of a coach and that was why they performed eru poor this previous season. Moreover, Napoli didn't finish the season unbeaten when they won the league.
Leverkusen is still have their coach with them that made the victory possible so it is an advantage to Leverkusen to be able to try as much as possible to win the league again because Xabi Alonso will improve the performance of the club as time passes by. I know that they cannot be unbeatable next season.
I have commented in this thread:
https://bitcointalk.org/index.php?topic=5465157.msg64258238#msg64258238Yes, in my opinion we cannot compare Leverkusen with Napoli because Napoli performed impressively in the 2022/2023 season but then their performance became very bad in the 2023/2024 season. Leverkusen has a genius coach like Xabi Alonso and I am sure he will be able to bring Leverkusen back to competing at a high level. Leverkusen has a weakness in one-on-one play and it was visible when Atalanta implemented highpress man to man marking tactics. But I'm sure Alonso knows his team's weaknesses and will make several player purchases in this transfer window. I'm not sure Leverkusen will go undefeated again next season. But Leverkusen will still be able to win the Bundesliga and may also be able to reach the UCL knockout stage.