Friendly Neighborhood Spider-Man

As parents protest Peter Parker's teaching position, a new Mysterio strikes by attacking Peter at school, surrounding the building in a cloud that the police are unable to penetrate. However, this attack has drawn other Mysterios out. Both Daniel Beckhart, and the deceased Quentin Beck are drawn to the school. Beckhart enters the fight with the intention of putting this new pretender down. But how and why is Quentin Beck here?