Bayern Munich is a very good club that has created a good name and image over the years not just in Bundesliga but also in other competition like the champions League and the FIFA club world cup competition, however recently they are not as strong and inform like before, in the recent ungoing FIFA club world cup competition the match they played with PSG showed that they are not really inform and strong like the Bayern Munich I know before, PSG was win with 1 goal and they later gave two of PSG players red card I was hoping that Bayern Munich will use that opportunity and score a goal so they can draw the match instead PSG that was already down with two players scored again making it two goals, this shows that Bayern Munich don't have strong defense.
So i believe if Borussia Dortmund, Bayer Leverkusen and RB Leipzig know what they are doing they can stop Bayern Munich next season, Kane is a very good player but it looks like Bayern Munich are putting more or all hope on him to deliver them always but it won't always happen and that's one mistake they are making right now.
Borussia Dortmund needs to pick form, what they is a good coach .

Xabi left Ten Hag a well-established team and a squad with good chemistry. It would take a long time to make this squad compatible. In fact, the Spanish manager did a very good thing and made the team ready. For now, it will be enough for the Dutch manager to continue the system that works and make a few changes to it.

Bayern Munich dominance in Bundesliga unchallengeable for long time due to their strong system and have no competitive opponent even Borussia Dortmund is having good squad but mostly due to their business model they have never been able to create problems for them.

Recently few clubs are doing good but sadly mostly are not consistent like them which is the serious problem in Bundesliga RB Leipzig and Bayer Leverkusen are had good depth but it's still long way for them to keep things on challenging for long run coming season most chances again Bayern Munich is going to be had good control. Bayern Munich is surely one of the prestigious club which is doing good in all events recently they are having some decline in quality, but now things are back on level, and they could be serious contender for double in coming season.

Ten Hag have had experience in this league before so there's chances that he could do well, I'm not going to conclude until I see how Leverkusen would perform in their first 5-10 games until then Dortmund are the only team I feel can challenge Bayern Munich even though I doubt if any team would take away their dominance like Leverkusen did when Alonso was there. Well with the squad Xabi left for Ten Hag getting into the Champions league shouldn't be a big deal.