The new Adventure Time miniseries is an eight-parter wherein he discovers what happened to the kingdoms of Oo while he was out at sea during Adventure Time: Islands. Given that Adventure Time is already destined to come to a close in 2018, fans will be happy for anything estra.
As for the new series, one is based on the OK K.O.! Let’s Be Heroes mobile game, Apple & Onion (from the creators of The Amazing World of Gumball) Craig of the Creek, Summer Camp Island, and Cloudy and a Chance of Meatballs and Ben 10, which are already existing IPs.
Cartoon Network hasn’t pinned down any specific release date yet, but can check out the full list of new shows here.