Cartoon Network Upfront 2018 has revealed information that confirms a third season for the Ben 10 reboot. Here's the synopsis:
Greenlit for a third season, Ben, cousin Gwen and Grandpa Max are ready for action that will be loaded with epic transformations, never-before-seen aliens and foes, and with high-energy vehicles to kick hero-time into maximum overdrive. New episodes from the current season, including a half-hour special will introduce the newest alien trying to invade Ben’s world – Shock Rock, who is looking to conquer the world and drain the planet of energy and resources. Ben 10 is produced by Cartoon Network Studios and created and executive produced by Man of Action Entertainment.