So what you’re saying is this is how the select screen would look like?
FIRST ROW
RANDOM-Margaret-SO-Naoto-Teddie-Yukiko-Narukami-Yosuke-Chie-Kanji-MINAZUKI-[Redacted]-RANDOM
SECOND ROW
Marie-Ken-Yukari-Labrys-Mitsuru-Aigis-RANDOM-Elizabeth-Akihiko-S.Lab-Junpei-Rise-Makoto
I still don’t know if they would do the hidden character thing but you make it seem more likely than before.
Yep, that's exactly what I mean. There are three things I mainly think of in relation to that possibility:
1. 3 random icons. It's been three random icons until now—so it's not as though it would be unprecedented—and if the width of the screen is going to be expanded upon, it might be necessary—from a practicality standpoint—to keep 3 random icons so that players don't need to constantly move to the far left or far right, if they're stuck in the middle, to choose random.
2. The main P4AU art (like the box art or the A5 clear file art). That art in question makes it clear that Yu stands in the dividing line between the characters, which is something that they might have wanted to reflect in the character select screen (plus, Yu being the main character). This is a concept that would no longer be maintained if the character select screen only adds Margaret and Marie, yet has the exact same layout. Which brings me to my next point...
3. Symmetry. If we assume that symmetry is something they want to maintain in the character select screen, and if we assume that there will be at least 2 random icons no matter what, only adding slots for Marie and Margaret will mess around with it a bit. There's the point relating to point 2 where Yu's column would no longer be at the center of it all, but there's something else that's been bothering me since Rise (and [Redacted]'s) introduction to the screen: the P3 vs. P4 juxtaposition, depicted on the box art, has been lost.
Here's a second proposal that I think would fix all of these "issues" (re-arranging as little as possible for clarity):
FIRST ROW
Margaret-Rise-Sho-Naoto-Teddie-Yukiko-Yu-Yosuke-Chie-Kanji-Minazuki-[Redacted]-Marie
SECOND ROW
Random-Ken-Yukari-Labrys-Mitsuru-Aigis-Random-Elizabeth-Akihiko-S. Labrys-Junpei-Makoto-Random
With that: there are 3 random slots again; the main P4AU concept of Yu (and Yu alone) at the center of it all is maintained and symmetry is maintained, with there being an exact row division between P3 and P4, as well as there being an equal number of characters going to and from Yu's column (6 on each side, on both rows).
It's all meaningless in the grand scheme of things because there is no evidence here, but if we're taking into account what the final screen might look like, this is something to consider. It's good to consider all possibilities.