Anyways, Donaire needs to decide after this fight no matter if he win or lose and if he will still pursue his career even though he is not getting any younger. He is already vulnerable unlike these young boxers who's recover and healing process is somehow shorter.
In fairness to Nonito Donaire, he's not like any boxer that is currently in the retirement period but still showing explosiveness. The fact that Donaire established 2 wins at between 38 and 39 years of age, and take note, it was both 4th round knockout wins, how can we even think that it's time now to hang his gloves.
Actually, from what I see, he just moves forward by having a rematch with Inoue because he won his previous fights and become a champion. For let's say he loses in his last fights, I doubt Donaire will still push on a rematch with Inoue. It means, he knows that he has the power to defeat Inoue regardless of the chance.
The main objective now is how to execute it properly on the day of the fight.
The Filipino Flash just gets better in time. He can't wait to get in the ring and fight his opponent. As Donaire is not getting any younger, i think his stamina for boxing gets even higher unlike for most of the retirees that they gets weaker and lose in the ring. But not in the case of Donaire, he becomes more skilled and passionate in boxing that he even wins his fights despite of his age. Well, i agree on you, he would not long for this rematch if he thinks he's not capable to win against Inoue. He knows he can still do it in the ring.