My suggestion:

"Hey liv, I don't want to be a bother, but i have a new idea for you! This idea came from the song "Kill the Lights" by Set It Off and my idea is that the Alter egos of Mark and Jack are kind of at war with each other (or just a serious rivalry that got out of hand) and after some time, the two groups are being led by Dark and Anti.... I'm pretty sure their friendship shattered along the way"