Ben 10: Alien Force

Five years have passed since the events of the Ben 10 series ended.

Now 15 years old, Ben Tennyson (voiced by Alexis Tomassian) has finally retired the Omnitrix and resumed a normal life, most having forgotten the existence of his past powers. But one day, his grandfather Max mysteriously disappears while investigating new aliens that have come to Earth, the DNAlians. Worried about him, Ben decides to put on the Omnitrix again, which, recalibrated, gives him access to a new arsenal of powerful aliens.
He soon discovers that the new race of aliens Max was investigating, the Supreme Commanders, are organizing a mass invasion to wipe out the human species (and by extension all other races in the galaxy). Ben is then led to form a team with his cousin Gwen and his former enemy Kevin to face this unprecedented invasion.

The enemies Ben10 meets are the DNAlians, the HighBreeds and Vilgax.