I've always thought it strange how everyone clamors over more Kirby characters and villains yet completely gloss over Dark Matter, particularly in favor of Bandana Dee. He's more of the main antagonist of the series than Dedede, appearing in some form or another in almost every non-Sakurai Kirby game. His moveset already writes itself and could naturally be one of the most unique in the series, but if they wanted to go even further they could reference some of the other Dark Matter invaders (Dark Mind, Dark Nebula/Zero, Void Termina, etc.). Easily my most wanted first party newcomer though their chances of being playable seem pretty slim due to being less popular than Bandana Dee.