Peter Pan Returns

My friend and I like to give each other fun prompts to write sometimes, and the one that she gave me was this:

"Write a fan theory about Peter Pan returning to Once Upon a Time. But make it a narrative."

So here is just a fun fan theory I made up.

*SPOILERS*
If you haven't seen seasons 3-4 of OUAT, you probably shouldn't read this. I mean you can, but there's spoilers. Obviously pointed out from the all caps SPOILERS that I wrote.