Not your traditional Superhero, Jack has chosen one of his favourite characters from the (Lego) Star Wars Universe–Luke Skywalker. Luke is a hero and he has super powers. Makes sense.
Not the nice, innocent Luke from A New Hope, but the Luke from Return of the Jedi. By this time Luke is a proper Jedi, black clothes with his hand chopped off by Darth Vader. He also now has a green lightsaber. Jack has drawn Luke on Tatooine, his home planet, famed for its 2 suns.