There are a lot of videos of Manny Pacquaio circulating in social media, other says that it was due to Manny training for Mario Barrios. But I will say that he is on the gym right now because he will have a exhibition fight in Japan.
So right now, this is just pure speculation, but as we can see, we could be seeing Manny again in the pro ranks if he wanted to and by the looks of his training video, for me he can still pull that trigger and if this fight happens, chances are good base on what I see on the training footage that he can beat Barrios despite his age.