Dortmund may still have a chance to improve their position in the standings, the points difference is also not far.
But for the trophy competition, I think Dortmund may be a little behind. It will be difficult for them to catch Munich who are already leading or Leverkusen.
Dortmund should be improve there things and playing after the Winterbreak , for sure the points difference is not that big.
The problem is when Bayern Munich and Leverkusen playing a draw or losing there games Dortmund also lose.
This kind of games are the only chances to catch up on the other teams , but mostly Dortmund missing that.
They missed a few seasons ago to win the title when their performance was good.
And last season they experienced a decline in performance. At the moment, they don't seem much different.
There is still a chance to improve their position, but I am not too surprised by what Dortmund will achieve.
The last seasons other teams was really better , specially last season with Leverkusen was unstoppable.
You are right, Leverkusen was unbeaten last season. Even Munich could not catch up with a fairly large point difference. But Dortmund did not perform well, it was not better than Leipzig and Stuttgart. This season the competition is also tighter. Leverkusen is no longer unbeaten like last season. Some teams are also getting stronger, if Dortmund can not keep up to improve their game, they will be further displaced.