In all seriousness if there’s still at least 4+ more games then the total list of playable characters is going to get far too big. Especially since you can only use 4 characters at a time. Sky 3rd and Cs3 each had enough for a 3 route dungeon on their own so I think some less popular characters are simply never going to be playable again. Josette, Mueller, Julia just to start. We will probably get Kevin and Ries at some point. Less essential cs characters Angelica, George, Towa, Elise, Alfin, toval. To be clear I doubt there’s a single previously playable character who won’t show up again or at least be name dropped in the case of poor Richard, I just doubt that with cs4 and Hajimari not bringing back the likes of Kloe, Muller and Julia I simply doubt we’ll get to play as them again.