I'm so sorry about Haller, I hope he gets well soon. He was an important player who was paid quite a high wage, of course nothing is more important than health. But it must have been a very difficult situation for the team as well.
There will be a positive development in a short time and he will regain his health, it is also very bad that he had such a cancer at a young age
It's a shame that Haller current condition, after Haaland departure surely Dortmund fans expect quite a lot of Haller right now, but unfortunately the testicular tumor he suffered forced him to undergo medical treatment and it looks like he will need quite a lot of time to rest, the league will start soon again and I think maybe Haller will miss his debut with dortmund in the League later, so it's better now dortmund find another striker to replace him before he fully recovers.There will be a positive development in a short time and he will regain his health, it is also very bad that he had such a cancer at a young age
So far they are not yet linked to any player to replace haller.
Luis suarez could be the best option available for now , it would be a bit strange to see him at bundesliga but worth to try though.