The predictable and cliched storyline would be that this other Sho is helping Sho with some insecurity he has about having friends (cause persona blah blah) and the persona characters change his mind in time for them to turn against the antagonist Sho. To note, I don't know much anything at all about the story other than there is two and one probably isn't actually Sho.For some reason, I have this feeling that Sho will become good at the end of Ultimax and will help or become part of the IT and the others.
Here's hoping not.