User blog comment:JonathanTennysion/Ben 10 Omniverse Info On Aliens/Villains/@comment-34285236-20120214130136

My theory:

16/17 year-old Ben sees Gwen and Kevin studying to go graduate, or go to College. So Ben's on his own, until he meets a new villain called Syber. He travels to the past to destroy Ben once and for all, so Rook meets Ben and helps him. They travel back in time to help 10 year old Ben. That's where they need him to stay alive, so Rook takes them to a Plumber Base to stay with plumbers. They travel in this spaceship to help battle forces to kill his past.