Here we have nothing new because if you are able to check history it's already happened many times Bayern buying quality players from Dortmund and enjoying this all for some seasons and then dropping them out and Dortmund management never try to use them for having their own better results they mostly love to buy players and then sell them to big teams for higher prices.
As now, we are checking Bayern is interested into Haaland then no matter they will buy him and having very strong attack even now Lewandowski going to leave Bayern for another club. Right now, Dortmund is looking for their desired amount and this is going to happen because after end of this season surely he is going to leave, and now we have only two clubs with Bayern is front and second one is Real Madrid.
As now, we are checking Bayern is interested into Haaland then no matter they will buy him and having very strong attack even now Lewandowski going to leave Bayern for another club. Right now, Dortmund is looking for their desired amount and this is going to happen because after end of this season surely he is going to leave, and now we have only two clubs with Bayern is front and second one is Real Madrid.
This is what Dortmund is doing things if they could get their hands on players with talent, they would eventually sold them into a higher price, Dortmund would set an example that they are a busy club
It's not a matter of Erling Haaland moving to any other club which causes the alarm in people's minds. It's about Erling Haaland moving to Bayern Munich which is absolutely dumb. 
I don't know why would Dortmund make that decision. I think obviously Dortmund is not going to make that decision unless they are on drugs or something!!
At a time when people are thinking Bundesliga to be a more competitive league and having more teams to compete against Bayern Munich, it does not make any sense to allow Bayern Munich to be stronger. I agree that it is really boring for the fans to watch Bayern Munich win the title again and again.
I don't know why would Dortmund make that decision. I think obviously Dortmund is not going to make that decision unless they are on drugs or something!!
At a time when people are thinking Bundesliga to be a more competitive league and having more teams to compete against Bayern Munich, it does not make any sense to allow Bayern Munich to be stronger. I agree that it is really boring for the fans to watch Bayern Munich win the title again and again.
It is what Dortmund would eventually do, they would eventually let go of Erling Haaland to make a huge profit, Dortmund is already doing this kind of cycle whether you like it or not they would eventually sell all their good players to clubs like Bayern Munich that can really afford them, and Bayern Munich is a club that can surely afford their number 1 player, so the possibility for Erling Haaland to be on Bayern Munich would have a higher possibility, and now that Erling Haaland rejects Man City offer said by rumors,
And yeah it is not really balanced for a team to have all good players but Bayern Munich is a club that can afford to buy good players that they can afford, but there is a possibility if they bought Erling Haaland they could even Let go of Robert Lewandowski,