Dortmund wont win the title this year i think they might not even close at all to winning it. They got a bad squad and they keep selling their superstars and top players so i dont see how they can win the title. They will be fighting hard for top 3 positions
I can't say that Borussia Dortmund have a bad squad next season just because they let off their young star. However they still have a better squad than any other Bundesliga contestant except Bayern Munich.
It's just that they have to re-adapt to the absence of Haaland in their attack, because last season what made the difference was the one who is now a Manchester City player.