When does The Amazing World of Gumball return?

The Amazing World of Gumball is a British-American animated sitcom. The series concerns the lives of 12-year-old Gumball Watterson, an anthropomorphic blue cat, and adoptive goldfish brother Darwin, who attend middle school in the fictional city of Elmore, California. Ben Bocquelet based several of the series' characters on rejected characters from his previous commercial work. The show is noted for its intentional stylistic disunity, with characters designed, filmed, and animated using various styles and techniques.
The series revolves around the life of a 12-year-old cat named Gumball Watterson and his frequent shenanigans in the fictional American city of Elmore. Gumball attends school with his siblings at Elmore Junior High, where throughout the series he interacts with his various middle school classmates, most prominently his love interest Penny Fitzgerald. Rob is a background character from the first two seasons who became trapped in The Void after becoming "irrelevant" in season 3, after which he becomes Gumball's nemesis.