Could be Glen Johnson if he does decide to take on more fight. Similar age, now in same weight class and Calzaghe pulled out of this fight 2 or 3 times as a SMW for valid reasons but gets stick of some people for not facing Johnson.
He's still waiting to receive some serious offers, so far there has been nothing. Despite all the talk from Hopkins, nothing concrete has been put forward. I think the only guy who truly wants to fight him is Chad Dawson and unfortunately for Joe Dawson's not even considered the best light-heavyweight in America so would be a big risk for very little reward. Hang them up Joe, there aren't any real challenges which you would get real credit for out there.