Let's talk salary cap
I doubt very much they will get rid of Carr. He has already renegotiated and extended. They will have to do this again, stretch the 3 years they owe him over 5. I really hate this way of doing business.
Perhaps a team like the Jets might trade for him, the Saints sending a high pick to them to get rid of the contract.
Otherwise, he will be on our books for about the next 5 years and probably play 2 or 3 of them.