I realized just how small the barrel of "Nintendo All-Stars" has gotten. Like, is there anyone else? That's why I believe the ballot has as big of a role as it does. With almost no one left as a glaring omission, Sakurai has only C-list characters and/or fan demanded characters
I'm actually of the opinion that there's a good number of prominent first-party characters remaining. No A-listers anymore, but that makes sense at this point in time. I still think there are several highly notable picks left, though. Ridley and Inkling were both top of that list, and Daisy is definitely very recognizable to the average Nintendo fan. Beyond that, you have Toad/Captain Toad, Waluigi (
most of the regular Mario cast, honestly), Paper Mario, classic Ganon, Dixie Kong, Cranky Kong, several of the more popular Pokémon, Isabelle, Ashley (especially where Japanese popularity is concerned), a couple retro characters like the Balloon Fighter and Excitebike guy, Isaac (probably a C-lister but no more obscure than Shulk was when he got in), Slippy Toad, Bandana Waddle Dee, and of course K. Rool. That's an entire game's worth of newcomers right there, and that's not even taking into account how Nintendo will always be creating new popular characters and how older characters will sometimes become more prominent and recognizable over time. A lot of people see the well as running dry, but I think that's only if you try to compare potential newcomers to juggernauts like Mario/Link/etc. There's still a good amount of Meta Knight/Ike/Little Mac-level characters left out there.
With that said, though, I do think the ballot was intended as a means to influence this game's roster, as we are now at a point where character inclusions aren't quite as obvious anymore and require more scrutiny to narrow down. Obviously, Mario and Link were top-priority shoo-ins back in 64, but it's a lot harder to weigh characters that are more secondary or tertiary in Nintendo's library. Taking fan requests into account can help streamline the selection process. Which is why I'm more confident about K. Rool than I was with Smash 4, which seemed to draw primarily from cross-promotion for its newcomer decisions.
As for the debate over the design they'd use? Well, I do actually like the Paon design. It's cartoony and fits with the modern DK aesthetic, though the classic Rare design has that juxtaposition of goofy and gritty that made the SNES DKCs so memorable. I think that a mix of the two would be best, and that's what I would expect to see. The Mii costume hints at more of a Rare influence, but I wouldn't be surprised (or disappointed) if they took some cues from the Paon design's anatomy and facial expressions. I don't have a preference either way whether he should have the golden gut, but I do want the larger crown and the tail. Though really, I just agree with everyone saying they'll embrace his inclusion whatever he looks like. He can be 1:1 with the Paon design and I'll gladly take it at this point. Playable K. Rool in any form would be phenomenal.