Keep in mind that Dortmund still have a 30 million buy back clause which is valid till end of this summer.
There have been reports that Isak not wanting to go back due to past experiences.
However a new coaching staff is coming in along with Michael Zorc, the sporting director, retiring this summer.
Mislintat (who signed Isak at Dortmund in the first place) is rumored to be the heavy favorite to take over.
So things might change quickly with the Isak situation.