From SpongePedia, the First SpongeBob Wiki.
Vincent Waller confirmed Season 12 in May 5, 2017. He also confirmed August 18, 2017 that the first season 12 script was finished. The title was covered in X's to keep it "top secret". The season will air in 2019.
|Sandy's Nutty Nieces||TBA||TBA||Sandy Nichten ankommen Bikini Bottom. Aber Sie ist überhaupt nicht glücklich. (Found on german spongepedia sources)|