DK hasn't had a newcomer since Brawl and is the current extremely popular and iconic franchise from the OG 8 to have less than 3 characters in total.
The demand for a DK newcomer is huge. Whether K. Rool or Dixie, I'm willing to bet that it will receive at least one newcomer this time.
Also, why are there people legit thinking Geni has a likely chance when his situation is almost exactly the same as K. Rool's, except worse because he's only had a SINGLE appearance that predates even K. Rool's last appearance and Nintendo also doesn't own the character.
If people has their way in here with all the requests, we literally wouldn't get a newcomer from Mario, Pokémon, DK, and maybe even Zelda. What does that leave us with? Ashley and Isabelle? Elma? That's three characters, and one is popularly requested as an Echo Fighter. Who else, besides these series we hold with high scrutiny would be relevant and add to the all-star roster? A couple third parties in the base game would bump that up to five (since we've never had more than 2 third-party characters added in succession) and would leave only room for nore Echo Fighters or the obscure retro picks.
Is this the most likely scenario? Oh wait, two of those characters were ATs and could ve disconfirmed at any time? Well, does that make them likely? Only one character has gotten special treatment when it came to the AT-to-playable treatment, and that was a popularly demanded Little Mac from Western audiences, I believe. To advocate for two of these ATs to get that treatment doesn't sound too likely now, does it?
In the end, we'll never know how Sakurai thinks and what he'll do, so this is why trying to demote others will get us nowhere, and I kindly ask that we stop raising any hostility levels before another Waluigi happens.