When does Adventure Time: Distant Lands return?

Adventure Time: Distant Lands is four hour-long streaming television specials. The first special was released on HBO Max on June 25, 2020. The rest of the specials were released on November 19, 2020, May 20, 2021, and September 2, 2021. The series follows the adventures of Finn (a human boy) and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will.