The 4th Season of the popular animated show had been delayed while co-creators Dan Harmon and Roiland negotiated a better deal with Adult Swim (see "'Westworld' Season 2 Trailer, Animated Deadpool Show Nixed"). Given the popularity of the brand, and the size of the merchandising stream, that is understandable (see "'Rick & Morty,' 'Supergirl,' 'Outlander'," and "Three New 'Rick and Morty' Games in 2018").
Oni Press releases the official comic book series, and has even launched several spinoffs (see "Pickle Rick, The Vindicators, Sleepy Gary Get Own Comics").Rick and Morty will also be appearing in a crossover miniseries Rick and Morty vs. Dungeons & Dragons co-published by Oni Press and IDW Publishing this summer (see "Two of the Hottest Properties in Geek Culture Cross Over in Comic Miniseries").
Cryptozoic has the games (see "Preview: 'The Pickle Rick Game'").
The premiere date for Season 4 was not announced.