I will not put any hope in Borussia Dortmund challenging for the Bundesliga title next season because Borussia Dortmund is not always consistent in maintaining the performance that will make them challenge for the league title. If not for Bayern Leverkusen in the Bundesliga this season, Bayern Munich would have ended up winning the Bundesliga title. Until Borussia Dortmund proves otherwise, next season's Bundesliga title race is between Bayern Munich and Bayern Leverkusen. When the transfer window opens, Bayern Munich will not only sign players but will also be careful to sign players who will be productive and help the club take its place in the Bundesliga League.
Basically, if they just do better than that would be enough. I am not saying that we are going to be considering this situation to be something that would be very sensitive because this time they are coming off a bad season, and it is not just Bayern that is good this year, Leverkusen did amazing as well. So all in all I think it is quite clear that we are going to end up with something that will take a while.
I hope that Dortmund joins those two teams and they do have a great three battle team, but I believe that Dortmund would have a bigger mountain to climb, that is why I do not think that it will be that easy to handle. I believe that we should just consider the situation they are in as something of a recovery more than anything.