Dortmund is not playing well this season. So, I really do not know if they will be able to get themselves into the top four positions or not.
But Dortmund should be able to get ahead of Union Berlin. Because Union Berlin is also not playing well. They could not continue the way they started the season. So, I think they will go further down on the table.
I am not sure about Dortmund. It is really hard to see if they will actually be able to improve or not because they are going through some big difficulties right now. Frankfurt is actually showing good performance. And their performance is actually more stable compared to Dortmund. So, I think Frankfurt will be able to hold onto the position that they are in right now.
If only to finish 4th in the Bundesliga. I still believe Edin Terzic can bring his troops to the end of this season. because after all, Dortmund have pretty good players when compared to Union Berlin or Frankfurt players. meaning, Dortmund has the potential to be ranked 3rd or 4th until the end of this season. for Freiburg, even I doubt they will perform consistently and maintain their ranking. I will not be surprised if Freiburg are unable to continue their consistency after the Bundesliga is restarted.
For RB Leipzig, they have the potential to be ranked 2nd until the end of this season. it could be that the 3rd position is taken over by Dortmund, or Frankfurt. I'm pretty sure, after the Bundesliga is rolled out again. Edin Terzic's troops will be better prepared to carry out match after match.