Any possibility that we have done this with a deal of first refusal on Reus or something? Can't see much sense in the deal at face value.
I´m probably going to regret this:
There is a tweet by Matthias Dersch of the "Ruhrnachrichten", who is after Freddi Röckenhaus ("Süddeutsche") the closest journalist to Borussia Dortmund. There he says that we have the opportunity to buy him next Summer without going into details, because this is all his sources have told him. Dersch does not have the reputation of bullshiting about such topics.
Now, if this would be a traditional buy clause the BVB would have obviously made it public with the signing. They left it completely open which is why most of the media does not have a clue and basically speculates at this point.
The question is if the clause is bound to certain conditions. Maybe it is meant to stay confidential to a certain point in time. Some speculate that it is tied to a big signing United wants to complete tomorrow and if they are successful (thus hurting Januzaj´s chances to play in the future), it activates the clause and if not they keep control over the decision where he plays after this season.
It could also be tied to a future signing of United. It is no secret that they had interest in Reus, Hummels and Gündogan for years. Reus is the least likeliest of them, though, simply because he does not appear to want to leave. He could have handpicked every club he wanted this Summer and instead turned down a huge amount of money to extend his contract. Why go through all this trouble to leave the next year?
Hummels is clearly someone who would improve United a lot, but currently gives of the impression that he wants to see where the yourney goes under Tuchel until he decides over his future.
This leaves Gündogan, who was already in talks with United this Summer but a transfer failed (appearantly because of wage demands on Gündogan´s side). Maybe United was not willing to meet his demands because there was doubt about his ability to return to absolute top form. Gündogan´s performances this season so far clearly indicate that he is on his way to meet said form, which might have sparked interest in United again.
The main reason why I see a buy clause as still possible is, that I can´t still wrap my head around the fact that United chose us as Januzaj´s club. To stay in the Bundesliga, why not Gladbach or Wolfsburg where he would have walked in the starting lineup and play CL? Why choose an EL club, whose front line is at the same time stacked enough so that Januzaj has no guarantuee to start replicating the same problem he might have had at United? Of all the clubs who might have been interested in loaning Januzaj, we were probably the ones which made the least amount of sense in terms of game time for him and thus his development.