If RJJ beats Calzaghe, he needs to literally run to the post fight press conference and immediately announce his retirement.
Roy would certainly make any realistic P4P list if he can beat Calzagne. It would help his legacy as well, the extent would be determined by how he defeated him IMO. Some would still say Joe wasn't in his prime but neither would Roy be the prime version obviously.
actually Roy was quoted saying that he wanted to sign a 2 fight deal with Frank Warren, so that the first match would be in Europe & if Roy were to win they would have the rematch in the states.... Big Business!!!:deal