Dortmund has made much money from transfer player, they have great scout talent how to make many young player have consistent performance and increasing up their values after one until three years with Dortmund. But one weakness side from Dortmund they not try to stop Bayern keep dominance in Bundesliga and has priority how to promote young player on every season for increasing their transfer market values.
After what Dortmund did last season, i don't have any hope in them to stop the dominance of Bayern munich in the bundesliga, Dortmund is a football club that are comfortable with not winning, Bayern were bad last season, but still won the bundesliga because Dortmund gave it to them. They have now sold Bellingham to Real madrid, so their team is now much weaker than it was last season, because of this i don't think Dortmund has any chance for the bundesliga next season. Bayern's dominance will continue, until another team that's not Dortmund improves and stops it.