Think about when the last time we saw John was. What was he holding?
Correct. He had the Voided ring that Hussie had in the dreambubble and which John (and Tavros) found. If this ring has the same powers as the one that Roxy has which provides “Voided-ness”, then it’s possible that we don’t have to wait for John to arrive.
He’s already there. You just can’t see him because he’s wearing the ring.
And don’t forget. The intermission usually shifts the focus onto another character. I’m willing to bet it’s John.
(Also, it’s possible John may have found the Trickster Sucker. In which case it’s not John who appears, but TRICKSTER JOHN!)