Adventure Time: Distant Lands

Adventure Time: Distant Lands is the collective name for four hour-long web television specials based on the American animated television series Adventure Time, which was created by Pendleton Ward and originally ran on Cartoon Network from 2010 to 2018. The specials are produced by Cartoon Network Studios and Frederator Studios and released on HBO Max-the first one being BMO on June 25, 2020, the second one being Obsidian on November 19, 2020, the third one being Together Again on May 20, 2021, and the fourth and final one being Wizard City on September 2, 2021.

Trivia

 * Prior to the official announcement on October 24, 2019, the special was kept secret and the project was referred to as the name of a non-existent show, "Rumble Jaw". The faux name was made by Kate Tsang.
 * Finn appears to have a new metal prosthetic arm after losing his other one in "Come Along With Me".
 * There was a sneak peak for the episode "BMO", released on April 5th, 2020, during the Adventure Time 10th anniversary live stream held by Olivia Olson.
 * The wand that Finn is holding in the poster is similar to the Rod of Asclepius, otherwise known as the symbol of medicine.