When does Ben 10: Ultimate Alien return?

Ben 10: Ultimate Alien is an American animated television series. It is the direct sequel to the 2008–2010 series of Ben 10 : Alien Force. The series premiered on April 23, 2010, on Cartoon Network in the US. In India and Latin America, it premiered on October 10, 2010. The series finale aired on March 31, 2012, with the two-part episode "The Ultimate Enemy" dedicated to the memory of series developer, writer, and producer Dwayne McDuffie, who died during the production of the series.