I'd like to ask what are your thoughts on John's dream in the prolouge? I thought the black hole was foreshadowing calliope but no, the black hole john was dreaming about was implied to be literally consuming all of paradox space and killing ghost and "destroying their hypothetical futures" I think this is wildly overlooked.

The black hole in John’s dream is the Dead Cherub’s black hole, as we experience it in Act 7. Its consumption of paradox space and ghosts is all true; that’s why we’re left with only an empty white void when he visits in the Meat Epilogue.

On the surface level the black hole is described that way because at that point in the story, that’s what we’re being led to believe is the truth; that everything being sucked into the black hole is dying.

In a more coded sense, the black hole represents a gateway to and from canon (See Pick Your Poison, Is Candy Canon?, Black Hole Theory), and John having nightmares about it foreshadows the choice he makes that sets the Homestuck Epilogues into motion; to either travel back into canon to the battlefield surrounding the black hole, or to allow himself to be taken into noncanonicity, where the black hole actually leads. Rose more or less confirms this when she offers her wisdom on the next page regarding her own visions.