Is Submarine Super 99 coming back?

Submarine Super 99 ended on May 8, 2003, after its single season aired on AT-X.

The series was an action-adventure anime that first premiered in 2003. It followed the story of Susumu, the son of a genius scientist, who embarked on an underwater quest to find his missing father and uncover a secret organization called Helmet Party. The show involved a mix of science-fiction elements, underwater exploration, and a fight against conspiracy, set against the backdrop of a high-stakes mission involving the advanced submarine Super 99.

The show had a runtime of 30 minutes per episode and consisted of 13 episodes in its only season.