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.
Yes, we haven't heard any rumors about which team has an interest in Luis Suarez and now Borussia Dortmund are reportedly looking to sign him. I think also it's good for both sides, Borussia Dortmund and Suarez will be mutually beneficial in my opinion.
Regarding Haller, this is indeed bad news that we can't help but accept, we wish him a speedy recovery.