I think regardless of the outcome of this match, he has to retire already. I mean, if he wants to retire as a champion and he is lucky to beat Inoue, then that's it because there's no other best boxer in that division than Inoue. However, if he loss and think of bouncing back, I think it's not a good idea since it will take time to have a chance to fight Inoue which he is not getting any younger anymore.
I do agree, it's time for Inoue to retire because he has been in many wars already, brings glory to him and his family and to the Philippines. Maybe this is one challenge that he need to take as a boxer before hanging his gloves. And it ever he wins, there are a lot of young fighters that will come after him and we don't want to see him getting brutally knock out at the end of his career. He can passed the torched to many Filipino fighters, he has done his share, him and Manny Pacquaio.
It is always sad seeing old fighters especially the legends being beaten by the up and coming young fighters. Most especially those fighters you think will definitely lose to those legends prime years. Donaire losing to Magdaleno? There's no way a prime Donaire would lost to that young gun. Inoue would've been an underdog against prime Donaire. There are a lot of examples from Rosendo Alvarez to heavyweight's Evander Holyfield. It is either money problems which prompted them to fight like Antonio Tarver or simply they just cannot easily moved on that they are too old for this hurting game like Roy Jones Jr.