Let's not get our hopes high on Kompany all because he won the Bundesliga league competition. The best he can do next season would be defending the Bundesliga yet again but expecting him to turn up and win the Champions League Competition? Well, a lot can still happen and I have no desire underestimating managers and players. Jonathan Tah has always wanted the move out. It's just the perfect timing to do that now.
I do not consider Bayern Munich as a favorite in the Champions League platform this season. Even then, the team played well enough. First of all, Bayern Munich's performance in the last season was weak. The team could not win any title. Moreover, Kompany is not very experienced that he can change the scenario very quickly.
It is impossible to say what will happen next season. But I agree with you that Kompany must first secure the Bundesliga title. Despite having such a strong team, if the team cannot win the Bundesliga title, it will be a shame for Munich.
Kompany has little experience. But he is quite talented. If he is given enough opportunities and time, maybe he can do well in the Champions League platform. But it is unlikely that it will happen very soon.