Honestly I didn't have any expectation from Dortmund to beat Freiburg in an away game. Their performance last week made me doubtful about them for this game. However they still managed to win this very tough game. And they did this by scoring three goals in the last fifteen minutes of normal time. Dortmund are still a very interesting team. It is hard to predict what they can do in this kind of games.
It is nice to see them winning vs a hard opponent so they won't let Bayern fly alone with the title since the beginning 
There is Leipzig that worth seeing if they could do something vs Koln and if Frankfurt will recover vs Hertha or they will keep bad results.
For Bayern they shouldn't have issues vs Wolfsburg