I'm sorry that you had the killer spoiled for you. But I do wonder, if that hadn't happened, would you have been able to guess who it was ahead of time anyway? A 'Whodoneit?' does sound like it could make for an interesting Persona story, I'm just not sure if it would be all that compelling for me after watching the story themed on death and letting go. Like 3 was their magnum opus, and 4 was a bit of a shark jump for me. Maybe I'd feel differently if I'd been the one to play both, or if there wasn't so much side content and spinoff stuff linking the two games together. (jumping ahead a bit) I am certain that something in the promotional material for one of the games (don't remember if it was 4 or one of the side games) mentioned that both of the games happen pretty much at the same time. I'm rather upset by that bit of false advertising, because I may have had more interest in 4 when I was younger if I hadn't read that, though then again, I was a much different person back in those days, so I don't really know how big a difference it would have really made. I remember them being fused together in pretty much every side game that came out at the time, in some way at least, but even if that wasn't the case, it's much too late to make a difference now lol.