Personally, I would like it to be Athena Cykes: Ace Attorney, because I feel like there’s a lot more that they could do with her character and they’re already basically done telling Phoenix’s and Apollo’s stories. Plus I feel like she was largely sidelined in SoJ, so this would be a great way of utilizing her.
Maybe they could also spice things up with the courtroom mechanics and have us argue the case in a much more interesting way.
I would love it if the actual courtroom was just slightly more open-ended. I know that’s really hard to do because it could spiral the story out of hand really fast, but it could be contained to individual parts of the case. For example, you could discuss evidence A and follow that thread to it’s conclusion first and then evidence B and follow that through. It’d be nice to do things in different orders when possible. I get irritated when I see a clear contradiction, but I can’t follow the thread until I present another piece of evidence first. This could potentially solve that.