Does the dark matter?
Chance: 1%
This is actually a quite generous rating all things considered. Let's start with the fact that any of the dream friends from Star Allies would most likely get in before Dark Matter. The primary three I'm thinking? Bandana Dee because obviously, Magolor as he's basically the runner up to Dee, and Adeleine as the 'on the rise' character after spirits were shown. Dark Matter would have to fight other Kirby character, including Gooey of his own species, other first party characters, and the myriad of third parties that are far more likely at this time. Not to mention, Dark Matter seems to find itself fighting the same battle that Bandana Dee, Magolor, and Adeleine fight, that he wasn't created by Sakurai, and that's arguably the hardest thing for any Kirby character to overcome. The final nail in the coffin is Dark Matter's inability to touch the ground. Every iteration of Dark Matter, be it swordsman or or normal form, floats above the ground. While I don't think it's impossible, he'd certainly be harder to make work than Bandana Dee or Adeleine. Heck, even Magolor floats above the ground more like Bowser Jr. does in Smash.
Want: 10%
I certainly won't deny that Dark Matter would be an interesting choice, but it certainly isn't my first choice of a Kirby character. Bandana Dee obviously comes first, and after him, I'd probably pick Magolor. Dark Matter I admit would've made for an interesting boss, but it's clear that Sakurai even prefers his own characters for bosses too, not just playable characters. Oh well I guess...
Predictions: Andy
I honestly forgot the name of the series he comes from, I knew it was something wars. After a quick look up, it was Advance Wars. Well... if Isaac was skipped over, Andy certainly has it worse. 2.64%
Noms: Q*Bert x5