…Who is going to be the killer in the last case!?
A few years back, I posted some thoughts on the Fan Translation of Ace Attorney Investigations 2 (tl;dr was: it’s very good and much better than the original AAI and you should play it). One thing I wrote at the end, is that they’re running out of fresh possibilities for the killer of the final case. Here’s a list, with marked spoilers, of all the different things they’ve done with the final case killers, along with their names.
AA1: Guest Prosecutor - Manfred Von Karma
AA2: Defendant - Matt Engarde
AA3: Main Prosecutor - Godot
AA4: Mentor Character - Kristoph Gavin
AA5: The Detective - Bobby Fulbright
AAI: Random NPC from the same case - Quercus Alba
AAI2: Random NPC from an earlier case - Simon Keyes
This leaves only a few possibilities if they don’t retread old ground: The judge, a random character from a previous game, the sidekick, or Phoenix/Apollo/Athena themselves.
They could also go with a weird outcome. In the DLC case of Ace Attorney 5, the ending of the case revealed that the death was accidental and that there was no murdered whatsoever. They could try doing something where it turns out the defendant is the killer, but you have to prove it was justifiable self-defense, which is a concept they’ve touched on very briefly in an earlier game.
All this being said, I have no idea who the “final case killer” was in Dai Gyakuten Saiban. I’m holding out for a far-off, someday Fan Translation. What predictions do you guys have!?!? Let’s get hyyyype!!!