This is how Going to stop Von Nebula goes in The Time Heroes.
[Starlight and her friends find the Hero Factory Heroes]
[Nightmare Moon sees Von Nebula]
Nightmare Moon: What?
Von Nebula: I am Von Nebula.
Nightmare Moon: But six ponies are to defeat me.
Von Nebula: True. And it is because of them, that I've gone back in time to prevent them from ever meeting each other and to make sure Twilight goes alone.
Nightmare Moon: But just how do you plan on ensuring that she does?
Von Nebula: I'll whisper it to you.
[Von Nebula whispers something in Nightmare Moon's ear]
Nightmare Moon: Oh, that sounds like a plan.
Von Nebula: Indeed it does.
[Nightmare Moon and Von Nebula