Since management changed from Paramount to Cedar Fair, they had to use Planet Snoopy at all theme parks (Kings Island, Kings Dominion, Carowinds, California's Great America, etc.) because they do not have the licensing to use the Nickelodeon name or any of its shows. Planet Snoopy will remain there unless Cedar Fair gets licensing rights to Nick or management gets moved where they can get licensing. Hope this helps!
No, Planet Snoopy is permanent. At least until something else takes over.