I read the new update and I'm confused about something, in [S] Terezi: Remember. You can see pre-retcon!Karkat in a Prospit outfit. Does this mean this works as an replacement for his dreamself? Just because of the outfit, will it still work for retcon!Karkat to reach god tier then? (Or maybe this is really stupid reasoning :p)

No, that’s just Karkat’s dead dreamself. Dreamselves have their own ghosts.