Dortmund are said to be interested in Luis Suarez now. He has been a free agent for nearly a month. I also think that it would be nice to watch him in the Bundesliga as I would like to see him continuing to perform at a European team. It is very unfortunate to hear about Haller's condition by the way. He has got testicular cancer and it is unknown when he will be able to return to football. Suarez might be 35 years old but he is a very experienced striker too. If he adapts well he can score a lot of goals for Dortmund.
It will also be better for Dortmund if Luis Suarez is successfully taken by Dortmund at this time because in the Bundesliga there are not many strong teams that are able to consistently and dominate at the top except for Bayern Munich. So in order for there to be stronger competition in the Bundesliga, it would be better if Luis Suarez was taken by Dortmund at this time.
I had my doubts about that a little, even when Luis Suarez was actually a part of Borussia Dortmund. I have no doubts about the qualities of Suarez, but what is needed to improve a more competitive League is the team as a whole. Last season also Dortmund had stars like Haaland, but can they make things difficult for Bayern Munich? I don't see that.
A stable squad is needed if any team challenge for the title to Bayern Munich. The Dortmund team depended on Haaland's performance. The team was not stable. And so they could not compete for the title with Bayern Munich. In the Bundesliga, we will see Bayern Munich dominate the league every season, unless other teams strengthen themselves. Of course, they have to spend money to sign talented players.