Monster Watch

Monster Watch is an animated spin-off based on the Ben 10 franchise. Not much is known about the series yet, as its existence was just recently announced.

Promotional videos
An impromptu promotional trailer was released on the YouTube channel Monster Watch, advertising the eventual release of the series.

Speculation
In the trailer, three silhouetted aliens can be seen. Going left to right, they seem to resemble Chill Factor, Hydro-Tide, and Flarecrow.