Will you have the reader stumble upon Cal and the remains of Aradiabot? Technically speaking (unless I'm misunderstanding how the defense portals are supposed to work in conjunction with a Scratch- maybe it's only the kids? It's left a bit unclear), there should/could be a scratch duplicate on Beforus from here: https://www.homestuck.com/story/3578
I don't know if it'd accomplish anything, but it'd be a cool reference.