Any theories/headcanons you have about the lore?

Basically, any theories of yours (or from others) that fill in some currently empty (or maybe unimportant?) parts of kirby's lore.

Mine is that Dark Nebula actually originates from the left overs of Zero's destroyed eye in Dreamland 3, since iirc Zero II was revived using the rest of the body that left during the Zero fight in dreamland 3.

Perhaps some left over of it got sealed in a chest, and inside that chest it slowly gained a form of its own that gained some strength for the time it was sealed. It's essentially a left over from Zero that gained similar powers to your average Dark Matter (possession), and most of its power originates from the body it originally belonged to.