The Marvel-ous World of Ponies

1 and a half years ago...

"So," Twilight said, unsure in tone, "you're telling me you're from a different world called 'Ponygard'?"

"Precisely," Rainbow Dash confirmed without hesitation, "the thing is, I kinda have to go back now..."

"Why?" All of Rainbow's friends asked in unison.

"I'm not sure, but my father needs me. So I'll go." Rainbow told them.

With that, Rainbow Dash turned and went through the Bi-frost. And she didn't see her friends again. Until now.