So the Fight Caliborn describes starting from [S] ACT 6 ACT 6 ACT 5 and onward. that's yet to happen, right? Like, the chronology is, the kids will soon fight the Condesce and the various versions of Jack, then the fight with Caliborn happens in A6A6A5 will happen, and likely homestuck will wrap up with Vriska releasing those stuck in the logo juju to fight buff English. Right?

Yes