Bayern Munich in domestic competition is too powerful so last season they always focused on the champion league. but this season in domestic competition the competition with leverkusen is very tough.
But this season Bayern Munich is the strongest candidate to win next to Manchester City and Real Madrid.
Big teams usually want to take trophies in competitions that are qualified in the domestic league and champion league. so Bayern Munich will not leave one of them to focus on the champion league competition. so all will remain the focus to win all prestigious titles.
They are a most successful club in history of Bundesliga and they won most titles. They simply dominate the Germany domestic league, Bundesliga, over many years.
Their domination dropped in the past season and they even nearly lost the title to Dortmund but they did not gave up and a very late winning goal from Jasmal Musiala in the final match day, helped Bayern Munich to surpass Dortmund at very last minutes of season, and win Bundesliga.
This season, they had better preparation by buying Harry Kane from Tottenham. The English striker is playing very impressive and there are some predictions that he even can break an all time record of Bundesliga best scorer in a single season, that is currently hold by Lewandowski.
With Kane, Bayern Munich also has one more key-maker on field and he can provide many deadly key passes, assists to his team mates. It's what Kane can do better than Lewandowski.