Kevin 11,000: Being trapped in the null void, Kevin absorbed alien convicts around him to create a stronger version of him self. He also collected the components that Vilgax needed for his omnitrix. Kevin recruited members such as Dr.Animo and the Forever King to Hex. HE is known as the co-leader of the Supremacy, and is the on responsible for their escape.
Dr. Animo: Animo used extra components from Vilgax's omnitrix to create a new machine that he uses to mutate animals, twisting them with Vilgax's stolen alien DNA. Animo is the strategist of the Supremacy.
Forever King: How he got in the null void is unknown. He used his armor to take control over part of it, and when Kevin came to him with the chance to get revenge on Ben, the Forever King quickly took the chance. He used some tech from his suit to build Vilgax's omnitrix.
Hex: Hex went into the null void courtesy of Gwen. He was the one who recruited Charmcaster into the team. Hex joined the Supremacy as soon as Kevin came to him with the oppurtunity. Hex wants the joy of dealing with Gwen himself, and has worked with a way with Kevin to channel his magic through Kevins alien form and cause as much destruction as he possibly could.
Charmcaster: Charmcaster joined the Supremacy when Hex told her the plan. Charmcaster has overpowered her magic and used her magic to give Vilgax's omnitrix life. She uses Animo's powers to combine her magic into the ultimate magic. that is how she helped escape the null void.
Vilgax: The leader of the Supremacy. He built his own version of the omnitrix to match with Ben's powers. Vilgax and Kevin were allies when they both went back into the null void. Vilgax enrolled Kevin as Second in command to help fight off Ben.
Those are our villains. Plese tell me what you think about them.