Descendants 5

It's been ten years since Cronus was defeated and Mal and Ben got married.
They now have a son named Rocket.
But what happens when Mal becomes story characters? And Rocket the author? What new threats awaits Mal when she becomes story characters from another world?

(New Characters)

Emma and the characters from Storybrooke

Peter Pan from Once upon a time
Wendy Darling
Captain Hook/ Killian from the wishing realm
And later characters comes later.
The characters from Reign