Given AD's contractual numbers, I think Minny is also looking at this draft and how deep it is, and really contemplating taking one of these backs in the top 3 rounds and just simply releasing AD for the cap relief.
They aren't hurting very badly on the cap, and they could definitely keep him, but releasing him would give them a ton of caproom in 2016. Draft a back this year, release AD, they still have a pretty good chance to make the playoffs if they draft well. They aren't a bad team, they just lack playmakers on offense. I don't think the difference between AD and say, Gordon/Gurley/Ajayi/Coleman/etc. is going to determine whether they win a Super Bowl this year or not so I can definitely see them releasing him outright at some point
I just can't see them keeping him at his current rate and I think this all just posturing to try and get something, anything, for him. I wouldn't be surprised if they got a 2nd or a 3rd from another team, but I don't think it'll be us. If they do take a back in the draft, I think it's probably an indicator he's going to be released, and I'd be all over that like white on rice.