Super Mario: The core four are obvious, and Daisy is an easy echo fighter. For other fighters, I went with Waluigi as he’s effectively the new Ridley. I didn’t want to cut Rosalina, but my constraints got the best of me.
Mario Sister Series: Ashley seems like a popular request, and Wario Ware had a couple games on the Switch.
Legend of Zelda: I find it hard to see us losing the main Triforce or Toon Link, and in Toon Link’s case, he seemed to be a high priority fighter going into For. Sidon helps represent Breath of the Wild/Tears of the Kingdom. I wanted to keep Sheik because I like her moveset, but I also wanted to give a couple newer fighters a chance.
Metroid: I don’t feel like there’s much to say here.
Kirby: We get our requested Bandana Waddle Dee.
Star Fox: With Sheik gone, I entertained also dropping Falco, but I think he’s easy enough to bring back.
Pokemon: Pokemon is a complicated one. In my opinion, Pikachu and Pokemon Trainer are the most important veterans, and Lucario is a popular pokemon outside of Kanto. Jigglypuff would scrape by like in Brawl and For. Tinkaton is a placholder for the promotional pokemon.
Not much to say about Mother and F-Zero
Ice Climber: I love Ice Climbers, but I do think they have some merit to stay because of their unique moveset, and I feel like Sakurai has a soft spot for them if he went to the point of removing 3DS gravity for trying to make them work.
Fire Emblem: This one is a really weird one. I’d probably start with Marth and Ike because the former is more or less the series poster child, and the latter is a popular protagonist. For the avatars, I’d at least keep Robin as (s)he seems to be the least divisive in the SSB community. Byleth would have been nice to keep given Three Houses‘ popularity, but there were other fighters that I would prioritize over her/him. While promotional newcomers are common for Fire Emblem, I think Engage is old enough that it would be skipped over.
Surprise Fighters: This one is kind of hard to gauge. The only one that I kept here is Mr. Game & Watch given his relative ease of development and his role as the surprise fighter poster child, but R.O.B. and Duck Hunt have their own merits too. I still think Excitebike Rider could work as a surprise fighter.
Kid Icarus: Palutena is a nice addition, but I had other priorities.
Pikmin: I think Oatchi could lead to an interesting moveset.
Animal Crossing: New Horizons is a behemoth, and Tom Nook is one of the most prominent characters missing.
Wii (Fit): Wii Fit Trainer is mostly a case of being a lower priority to me.
Punch-Out!!: Not too much to say except that Little Mac is a popular fighter.
Xenoblade: Shulk and Aegis have their own merits to stay on the roster in my opinion. Noah is like Alear where timing doesn’t seem to fit well for him.
Splatoon: I wanted to add a Splatoon newcomer, and I went with two given Octoling’s ease of an echo, and the second fighter is a pop idol duo.
ARMS: I could see Nintendo entertaining the idea of keeping ARMS.
New Franchises: Ring Fit Trainee is usually the frontrunner given Ring Fit Adventure’s huge success. I entertained Isaac, but I’m mostly focusing on building off of existing franchises here, and Excitebike is more or less the surprise fighter.
Third Parties: These are truly wild cards as this depends on licensing and where Sakurai/Nintendo wants to focus their licensing priorities. I think it‘s safe to say that Sonic, Pac-Man, Mega Man, Ryu, and to a lesser degree, Bayonetta would be higher priorties. After this, it gets pretty complicated where the question becomes how we’ll prioritize among most likely Konami, Square, and Microsoft. At the moment, I’ll lean towards Cloud and Steve as I think Square wants Cloud in the SSB Brand, and Steve seems to be an endeavor that Nintendo would try to go through again after going through a five year process to get him added. For newcomers, Knuckles is my twist on a Sonic fighter (going the Project + route here), and Lloyd seems like a popular enough request.