alot of things in the comic are not explicitly stated nor ever even referenced at all, yet still remain in the fandom egregore.

in regards to the dreambubbles, yes, i think everyone in the dreambubbles is dead. i don't recall giving much attention to the dreambubbles once the comic went haywire. i like to think the destruction of the dreambubbles serves as a symbol of the supreme reality winning.

in regards to head cannons, they're quite expensive and extremely impractical.