Ciro Immobile - Torino
After missing all of April with an injury, Immobile appeared as a substitute in the final two matches of the season for Torino. While he didn't score, it was good to see Immobile back to full health.
Will he come back: No. Simply put, Immobile has likely seen his time in Dortmund run out. He did not pan out into the striker which Dortmund hoped he would, and with Aubameyang and Ramos as top strikers, there would be no room for the Italian international on BVB. He will probably stay in Torino
Jakub Blaszczykowski - Fiorentina
Kuba was constantly shifting in-and-out of favor, and failed to play in La Viola's last four matches. He finished the campaign with two goals and two assist in all competitions for Fiorentina.
Will he come back: I'd like to think so. While Dortmund is trying to become a younger team, Kuba's experience and skill at winger is second-to-none and could be a valuable asset. If Mkhitaryan leaves, Kuba could be brought back to help fill a leadership role in the dressing room. But with the acquisitions of Mikel Merino and Ousmane Dembele, along with the possible return of Mario Gotze, in doesn't appear there is room for Kuba back in Dortmund.
Pascal Stenzel - SC Freiburg
On loan until 2017, Stenzel will get to face his parent club next season after helping Freiburg earn promotion back to the Bundesliga. Whenever Stenzel played, Freiburg didn't lose, winning ten and drawing once. He played an instrumental role in a stout defense that allowed Freiburg to capture the 2. Bundesliga title.
Will he come back: Too early to tell. He fits in very well with Freiburg, but could be developing into a defender that would work well in the Dortmund system. We'll see next season.
Jannik Bandowski - 1860 Munich
He played just once for 1860 Munich all season, a team that just missed relegation by two points. It was an injury-plagued season for Bandowski, who's loan spell since January 2015 will be coming to end shortly. In 17 matches with 1860 Munich, the defender scored twice.
Will he come back: Very unlikely. He never made a first-team appearance with Dortmund, and seemed to gel well with 1860 last season. He would have trouble breaking into the first team at Dortmund if he returned, so he will likely go back on loan or transfer permanently to 1860 Munich.