Wanted Posters

Purpose
There two posters for Sophia and Zenkichi which were first shown during the Opening song. Joker asked Yusuke to make them because he wants them back but yet none of the others remember them. Which could be a theory that this Joker (Episode 2 onwards) is from the Persona 5 Strikers' timeline and the others are from the Persona 5 Royal timeline since they don't make sense for both to happen. Their posters could be a hint that they will both join at a later date.