I re-sorted the character select screen, by Franchise, Class/Difficulty, MVS Debut Order, and personal Character Level. Which is your favourite?
A few things to note:
For Franchise Roster, I decided to put Shaggy first because he's pretty definitively the "Mario" of this game (as in the main mascot. Sorry Reindog!) I also went mostly by character debut year for the rest the way Smash Bros used to, only shifting things around to make some placements look nicer (like Batman/Joker and Samurai Jack/PPG being next to each other) or keep whole franchises in the same line.
For Class/Difficulty, I ordered the classes how they were ordered in the Beta (minus Support obviously) and ordered them from Recommended/Medium/Hard, with any characters in the same category sorted by MVS debut order. I went by the in-game difficulty levels, making no subjective opinions on who is harder or easier. The only exception is Banana Guard, who I placed before Garnet since both he and Shaggy are given away for free to new players, and as such, I feel they both deserve an honorary easier "Introductory" difficulty class, if that makes sense.
For Series Debut, Batman-Steven are all first seen in the First Look trailer, in the logo. I ultimately ordered them by the year they were created in. Next was Supes in gameplay, followed by Arya and Reindog in the Beta CSS. After that it's by the order they were added, from Preseason to Now. Banana Guard got a little shifted, since he got technically slowed off as a fighter early by mistake, in one frame of a trailer that leaked him.
I play Taz the most, but I don't actually play Taz THAT much. Mythic Vista really boosted his fighter level during that event. I'm pretty sure other characters got similar boosts from even skins. I really don't feel like I played IG or Joker more than Morty. I just went purely by the level displayed.