Disney Channel is out with the first teaser and synopsis for Descendants 3, providing a 30-second glimpse at the upcoming original movie that continues the popular good versus evil saga. In Descendants 3, the teenage daughters and sons of Disney’s most infamous villains (also known as the villain kids or VKs) — Mal (Dove Cameron), Evie (Sofia Carson), Carlos (Cameron Boyce) and Jay (Booboo Stewart) — return to the Isle of the Lost to recruit a new batch of villainous…