Let’s assume all this is true, and these players all want out, rather than to sign again in Calgary.
Lindholm and Hanifin are pretty straightforward. There will be tons of interest. The problem with moving Backlund is, there are so many teams trying to move pieces right now, he’s going to be the backup, to the backup plan for teams looking to fill a hole. He will likely end up somewhere, where that team wasn’t able to land what they see as better fits. So chances of moving him at the draft or before, is pretty slim.
He’d probably be a nice fit for a team who has youngsters they see as a Top 6 C, but probably aren’t quite ready for that responsibility yet. Detroit, Columbus, etc. Those teams are going to be in on these other players though.
So the Flames may be forced to be very patient with moving him, if they want the best value in return.