Setting
SP: Shortly after Bedlam (just disregard the Sebastian segments, the story wouldn't make sense if they happened)
OUAT: A couple of years after Season 6.
"What are you doing?" asked John.
"We've found it!" said Adam. "A magic bean!"
"Good," said John. "We need to get this letter to Storybrooke before Darquesse gets to us!"
Even though Darquesse has been destroying the Enchanted Forest for months, searching for survivors, John and Adam have been careful not to get to her. It was inevidible. They were going to die. Wherever this devil god came from, The Savior is going to have a word with them. They had written a letter and are sending it to Storybrooke very quickly.
Darquesse will find them.
And they can't risk her getting to Storybrooke.
They couldn't escape themselves, so they wrote the letter and were sending it there. They can't defeat Darquesse, but they were sure that The Savior and her friends can.
Surely, they can defeat anyone, can't they?
No, they can't think like that. They had to get this to Storybrooke. They will think of a solution.
"John, Adam!" shouted Darquesse. "Your hiding days are over!"
Darquesse has found them.
"Quick!" shouted Adam.
John threw the magic bean at the ground. Adam quickly threw the letter into the portal. The portal then closed before they could get to it. Darquesse didn't know about Storybrooke. They couldn't risk that.
Darquesse came out, and John and Adam's fate became the same as anyone else's. As long as Emma Swan and her friends get here soon, it will all be okay.