So far there has been no confirmation of Suarez's situation to Dortmund, but I agree that Suarez might be a good option to consider during this season. His free transfer status means Dortmund won't have to spend a lot of money, so I'll be looking forward to more news on this.
I really doubt Luis Suarez is willing to say no if Dortmund actually approaches him. Luis Suarez's future does not seem to be very exciting based on the offers he is receiving since leaving Atlético Madrid. And if he does be able to play for Dortmund I think he will be able to play better once again. In addition, he didn't play very well last season, so I am also skeptical about that. As the prolific scorer that we all know him to be I don’t think that he quite lived up to the expectation. And no I don’t see how he’s equipped to be a successful replacement for Haller.