I am curious if the K. Rool groundswell is one among many flashes-in-the-pan, or actually the new status quo - like, if he doesn't get in as DLC, will he remain a constant point of discussion on the road to Smash 5?
Essentially, is he the new Ridley or the new Banjo-Kazooie?
I definitely think people'll be pushing him for Smash 5 if he doesn't get in now. He was decently popular on various forums, even before Brawl's release. The Ballot's just letting people run wild. On top of that, there were other factors leading to the increase in K. Rool support, too.
I feel like I remember a voice for K. Rool before Brawl was released, but that was so long ago at this point that I can't say for sure.
There was, but there were also 2 games' worth of newcomers that hadn't been added yet (And also Ryu). A lot of the obvious picks like Olimar, Lucario, Mega Man, etc. have since become a part of the roster, so a lot of players that wanted, say, both an Animal Crossing rep and K. Rool now only need to be vocal about K. Rool.
Plus, there's that whole "3rd most-wanted villain behind the inevitable Wolf and the denied Ridley" medal K. Rool's wearing. Smash is lacking in villains, and people want to fix that. Someone may want Ridley, or Wart, or N or someone more than K. Rool, but a lot of the people who just want a new villain decided that K. Rool's the best chance a newcomer antagonist has. I definitely remember K. Rool support from the pre-Brawl days, but I think these 2 factors combined are why K. Rool supporters are the loudest right now.
EDIT: Well, at least in terms of my online experience. I've met some
very vocal Shovel Knight fans in real life, but it's only been a few specific people getting really belligerent in real life, and it's not as bad online. Maybe it's because I avoid Reddit...