Forgotten Homestuck fact: Hussie didn't say there would be an epilogue, but that there would be a "thing resembling an epilogue". That could be just about anything that comes after what we've had so far. Fanmade continuations would even qualify as epilogue-resembling things.

The epilogue is going to be a 30 second long post-credit scene tacked on to the end of Hiveswap Part 4.