most people will say this but however there is no team that can break Bayern Munich's dominance because even though Dortmund almost broke their dominance last season they failed and this season there is Leverkusen who will try to put pressure on Munich to break their dominance of the bundesliga title but if Leverkusen makes a mistake several times it will definitely be very easy for Bayern Munich to shift him from the top of the standings and Leverkusen opportunity to get even more superior players comes in january and we'll see if Xabi can get talented players to strengthen the team consistently.
It's true Bayern Munich has got a very strong dominance in the bundesliga and over the years most teams have really found it very difficult trying to break their dominance as several attempts has failed and currently considering the team dept, I don't think they could get broken any time soon.
Lewandoski in Bayern Munich always performing the goal magic for them is another big advantage they have got over every other team in the bundesliga. Bayern Leverkusen is the only team currently with the potential to probably bring an end to Bayern Munich dominance in the bundesliga but they still need to strength their team, Xabi has done a great job so far in the team but when facing a team like Bayern Munich he will need a really different and better approach if he must stop the bravians, but I believe if by January Leverkusen gets the right reinforcement they are definitely going to be able to contend the bravians well enough.