The way I'm thinking of it is just a tiny bit of 'amnesia' and turtle magic™. For example, I'm fairly sure Stiles has made at least one reference to Hulking Out on Teen Wolf. So encountering Bruce Banner might not ping any memories. But seeing a giant green dude getting his smash on will DEFINITELY do it.

Basically? Until I hear otherwise from individual players, all canon-puncturing references will be held strictly to the Super-Powered alter egos.