I predict that whoever the U.A traitor actually is they will attempt to frame Neito Monoma for their crimes. As I mentioned in my last blog, Neito Monoma's idiosyncracies seem suspiciously like supervillain cliches, in a way this makes Neito Monoma the perfect scapegoat.
If I'm right then the framejob on Neito Monoma may be preceeded by an arc where Monoma pisses off the rest of Class1B. Hitoshi Shinso will be one of the few people who believes in Monoma's innocence.
This prediction isn't dependent on my headcanon that "Neito Monoma is All for One's son" but if that headcanon is correct then that could be something that comes to light during the investigation and is held against Monoma.