Ep 1. The More Things Change, Pt. 1

Ben 10: Omniverse, Vol. 1 season 1 episode 1 is titled "The More Things Change, Pt. 1". The episode begins with a grown-up version of Ben 10, who has returned to Earth after some time in outer space. The city of Bellwood has transformed from the way Ben remembers it, and he's surprised to see that his cousin Gwen has also undergone changes. Together with his new partner Rook, Ben finds himself in the middle of a battle with a new villain - Khyber, and his dog-like alien partner Zed.

Khyber, who is a skilled hunter, is after Ben because he wants to capture his powerful Omnitrix watch, which allows Ben to transform into different aliens with special abilities. Rook has a special weapon called the Proto-Tool, which transforms into different weapons that help him and Ben battle Khyber's attacks.

Khyber quickly proves to be a worthy opponent, and Ben has trouble using his alien transformations to defeat him. Khyber is able to analyze his opponents' fighting styles and adapt to their moves, making him almost unbeatable. The episode ends with a cliffhanger as Ben and Rook are kidnapped by Khyber and taken away on his spaceship.

"The More Things Change, Pt. 1" sets the stage for the rest of the season, introducing new characters such as Rook and Khyber, as well as showcasing the growth of Ben as a character. He's no longer the carefree kid from the earlier versions of the show, but is now more mature and experienced in his battles. The animation style of the show has also been updated, with more attention to detail and some new designs for the aliens that Ben can transform into.

Overall, the episode is action-packed and exciting, with plenty of moments that will keep fans of the series on the edge of their seats. It's a great start to the new season, and promises to offer even more thrills and adventures as Ben and Rook continue to take on new villains and challenges.