Don't really wanna get into the Kane thing too much but the guy is the face of the organization. One of the best player's in the game. Highly doubt the Hawks would move on.
As for Rice, he's going to be 29 near the end of the season. He had a full year off football, so he's going to be pretty fresh.
His 2013 season was filled with injuries. Rice played through a major hip issue (didn't complain once). Also played behind the worst o-line in football which was plagued with injuries. I give him a pass for that year.