In my opinion, it is too early if we judge that only the two top ranked teams at the moment will win the Bundesliga, because the league has only been running for 11 matches, meaning that not even half of the season has been underway, in my opinion there are teams below them that could still move up to the top rank to win the league. This season, including Borrussia dortmund, which is only ranked 5th, currently there is a chance, even though they have only got 21 points, they are 10 points behind Bayer Leverkusen, who have 31 points, the possibility is not too small for them because this is only the start of the season.
Well, even now it's still too early to decide on the championship but for the mid-season and the end of the season too I don't think there will be much change here as the only possible additions are Dortmund and Leipzig which every year they are always in the Champions League zone and join the competition.
Last season there were a few other clubs that could have been in the mix but for now dark horse clubs like Freiburg and Union are still underperforming so maybe they will be excluded now.
For VFB they had a great start to the season and we saw that they improved a lot this season but in the last few games we saw how they started to have problems so I would also rule them out.
It definitely too early to decide the champion, so many things have changed in this season just as if they substituted each other, take a look at union Berlin that finished last season in fourth position are now in last position when match is still in 11 game while VfB Stuttgart that were battling not to relegate are now sitting comfortably in third point living behind second runner-up of last season with two points interval and Leipzig in the fourth position have one point in between, VfB Stuttgart performance this season show how serious the want to make it to champion league next season.