Nothing says that this order is the same one that is being used in the game. Judging by past Japanese trailers for the DR games, I feel like the reason these characters are silhouettes is because they are still just basic design concepts without completed ingame art. Both DR1 and SDR2's trailers showed off a bunch of ingame sprites of characters for a split second before we actually learned who they were. But all we've gotten from V3 so far is static screenshots of just these three characters. As such, I feel like it's pretty likely that they didn't order it this way with the intention of having the same order at the end of chapter screens. That, or as mentioned they're going out of their way to hide the protagonist (Which might be another reason for not showing the rest of the cast ingame?) which would be another reason to not give a definite order to the silhouettes.
Also, I feel like some of you might be misunderstanding the discussion scrum. When the text mentions 'teams', it's referring to two sides of an argument. As in two groups of people arguing over something, rather than just 1 against 1 like in the sword minigame in SDR2. Organizing sides of the argument by gender would be odd.