After falling through a wormhole, a powerful young superhero with supernatural power is thrown through a whirlwind when he finds himself in the “Real World” where he and his adventures have been nothing more than a series of books.

As the others have said. The logline has an inciting incident in the form of a force majeure that hurls the protagonist across the thresh hold into another world and transforms him into an ordinary person.

What must he do when "he finds himself" as an ordinary person in the "real world"? What becomes his objective goal? Who opposes him -- who is the antagonist? What's at stake?

As the others have said. The logline has an inciting incident in the form of a force majeure that hurls the protagonist across the thresh hold into another world and transforms him into an ordinary person.

What must he do when "he finds himself" as an ordinary person in the "real world"? What becomes his objective goal? Who opposes him -- who is the antagonist? What's at stake?

This sounds like a play on fish out of water and an exercise in dramatic irony. But once the fun of seeing the MC deal with the new surrounding and learn the rules of the real world they will need a plot and that's not coming through the logline.

There have been many films where a fictional character is magically transformed into the "real" world: as mentioned previously Last Action Hero, The Purple Rose of Cairo, Stranger Than Fiction, the end of The Never Ending Story, Who Framed Roger Rabbit, Space Jam, even in a Halloween special of The Simpsons Homer falls through a wormhole into the "real" world.

As a well established trope the magical mechanism by which the MC travels to the real world needs little if any explanation best to focus as mentioned above on the MC, his or her goal, and the antagonist.