Given the changes made by the Bundesliga teams for next season, I don't think anyone doubts Bayern Munich's ability to defend their title. Indeed, none of the top Bundesliga teams have made significant changes to match Bayern Munich's strength.
Their success in acquiring Luiz Diaz certainly has the potential to significantly sharpen Bayern's attack. He is a highly qualified player, and the decision to join Bayern is certainly the right one for him, as he desires more playing time.
Obviously the champions league is what we will be looking out for with what Bayern Munich will be able to do at the champions league. They may not have so much to worry about in the Bundesliga but mind you Erick Ten Hag at Bayer Leverkusen is something they should watch out for, I know having Diaz on their side gives them an advantage that will keep them ahead but ther are times when a game or two could deny you a title, so Bayern Munich will have to be mindful enough not to be positioned in a place where they begin to struggle to defend the title because they have channeled more of their focus nd attention to the champions league.