Trolls 4

Just as Clay and Viva are about to seal the day they have been waiting for over 12 years for, a terror occurs.
Velvet has escaped from prison and is determined to get her revenge on Brozone. Now that all our favourite characters are settled down with families of their own, they are unsure what they should do.
Can a family of singers really stop a villian who is sooo difficult to deal with normally or will they all come crumbling down?