Bayern Munich is looking unstoppable because there are no better opponents to challenge them this season, they have won some games with luck same way luck was working for Bayer Leverkusen last season, Bayern Munich is the best time this season in their league and Bayer Leverkusen is struggling to win matches, Dortmund is not among the league contenders same thing with Frankfurt, It is only Bayern Munich and Leverkusen that is challenging for the title but sin e Bayern Munich is 8 points ahead of Levekusen they stand a better chance of winning the trophy this season.
Bayern Munich is doing very well this season but it is also because they have not had to face many strong teams. They have won some games just by luck but overall they have played very well and are now far ahead in league. Bayer Leverkusen on the other hand is not doing as well as they did last season and now they are 8 points behind Bayern Munich which makes it hard for them to catch up. Since Dortmund and Frankfurt are not competing for title anymore it looks like Bayern Munich will win trophy this season unless something unexpected happens and they lose.