Well they can't announce for him he's probably going to retire and wanted to give him a final salute. Only way he comes back is if he takes like 2/3 of next season off, does a minor league PTO for the contender he wants to sign with and then gets brought up to the big club if he has no setbacks like what happened to Foppa on his attempted comeback.
Honestly though, why would he come back? He made his money, won his Cups, will get his number retired and will get into the HOF. What is there to gain in coming back now earning a token amount of money?