At least one of the hidden trophies is a "Win as _________" vs. AI in "Play" (Exhibition). Can't see any of the hidden ones on "playstationtrophies.org" trophy list page for the game yet, though, so there may be just that one hidden one like that or quite a few.
There are also identical, non-hidden ones for winning singles matches in Play vs. AI as Miz and Daniel Bryan.