I didn’t know about the omegaverse until several months ago, when I was doing some research about fan fiction in general. For those who aren’t aware, in these types of stories, the characters have a defined and hierarchical biological role (alpha, beta, or omega). The relationship dynamics thus resemble those seen in packs of wolves. It originally emerged in explicit stories, but has since moved downstream into less explicit stories. Some might even argue that it’s become mainstream.
I don’t care for it.