I feel that way too many people put too much emphasis into genres and Nintendo making their decisions based off of genre diversity. While I know that many people like to fill their wishlists with characters to rep certain genres (myself included) but I don't think Nintendo has any interest or even notices that they're is an imaginary fan-made quota that must be met. Same goes with color theory and them making costly decisions off of random color association. RPG characters are the most requested (see Geno, Isaac, Sora, etc) and the reason is because players spend extensive amount of time with these characters, getting to know them over the course of generally lengthy games (another Smashboards user made this point and I wish I could link to the OG post since it was a great read and makes a ton of points.
I mean if Nintendo really cared about genre representation in the Fighter Pass, would they of released two JRPG characters back to back and to start the pass on top of that? Imagining the conversation at Nintendo is quite funny actually:
-Sakurai: Ok, so we have finalized our decisions. The 5 DLC characters will be Isaac, Hero, Geno, Sora, and Banjo & Kazooie. These are the most requested characters we have seen consistently over the years and would be a great addition to my magnum opus.
-Nintendo: Woah woah woah... hold on there, bud. That is waayyyyy too many RPG characters. We need you to trim some of them down.
-Sakurai: ...but they are highly requested and I'd enjoy working on them. I think they would be fine additions to the roster.
-Nintendo: Nope, too much RPG and we get enough complaints from the fan base about too many anime swordfighters so we are going to need you to reduce those selections down and choose some more genre variety from the list. Also, we want to hype up Persona 5 so we need to put Joker in there.
-Sakurai: If we get these characters in, it will truly be the Ultimate version of Smash with so many big requests being added.
-Nintendo: Doesn't matter. Testing groups show that genre variety sells more so please select 3 new characters. Hell, we will be generous and allow you to keep Hero since DQ is so big but NO MORE RPG CHARACTERS AFTER THAT!
Sakurai: You do realize that cuts out a lot of these potential newcomers on this list, right?
-Nintendo: Blah blah blah. We got 2 RPG characters, that's enough. There's a 3d platformer too so maybe throw in a fighter and a FPS rep or something. You'll figure it out like always. We will just release the others as Mii costumes and call it a day.
-Sakurai: Alright, I suppose a FPS character would give the western audience another rep.
-Nintendo: HOLD ON THERE! Only one western character and Banjo & Kazooie fills that spot. Try again.
Jokes aside, I just don't see Nintendo doing some 4d chess on making character selections based on the color of Joker's gloves or Banjo's pants nor do I believe there is some tally on a wall in their HQ that makes sure the genres are fairly represented in a video game DLC pass. Just my opinion though and had to state it after Lloyd has been pushed to front and center leading to a lot of people saying it's impossible or very unlikely due to there being 2 RPG characters already in.