as long as Dortmund sell their potential players, then it is unlikely they will shift the dominance of bayern...
the latest news which I heard, Madrid ready to bid Bellingham, madrid even offer a very big money. Dortmund will surely be tempted by the money, just as they did haaland.
The thing is that it is not so easy for Dortmund to hold onto their world class players. Dortmund is not a top club for winning title on the European level (of course also not on the national level thanks to Bayerns dominance

). If then a top club comes and pays good money for their top players they might be more or less forced to sell before the players get unhappy or might leave at the end of their contracts for free.