Impossible. The timeline change is Rainbow Dash not doing the Sonic Rainboom. So Luna was still trapped in the moon as Nightmare Moon.Most likely either.-Celestia manages to beat NMM by herself in this timeline and both get dunked by Discord when he breaks out of his stone prison.-NMM beats Celestia and we get the NMM rules timeline until Discord breaks out. Discord then dunks NMM so hard she goes back to being Luna and unseals Celestia so they can both be his personal clowns.