I don't think Haaland will continue in the Bundesliga. If so, he will not leave Dortmund. He is more likely to go to another league, another team. My guess is Real Madrid can buy him. Benzema's seasons not long now. Haaland is a quality striker who can play for many years in Real. I also heard that Haaland wanted to play for Real Madrid.
Real madrid really can buy him but I feel it will be very difficult for haaland because on the other hand Madrid are also in the hunt for mbappe and with this I think the competition will be tougher in madrid strikers.
I still want to see haaland go to the actual EPL but indeed until now there is still no clear news about haaland's future at this time