Shannon Lucas is the main antagonist of the 2015 direct-to-video Scooby-Doo movie, Scooby-Doo! Moon Monster Madness. She is an astronaut who dressed up like an Alien on the moon to make people on earth believe space travel isn't safe. In the process, she almost permanently destroyed Daphne Blake's friendship with Velma Dinkley.
Role in the movie
Shannon was first seen during the Celebrity Heat News broadcast. She later welcomes Daphne, Velma and the Mystery Inc. boys onto Sly Baron's spaceship and commented on their nice spacesuits and their results on the space test they took, claiming Daphne's score to be the highest, much to Velma's jealously. Once in space, she used her alien costume to damage the ship, causing to land on Sly's resort on the dark side of the moon. She then terrorized Scooby-Doo and Shaggy Rogers with her alien costume. Eventually she was caught by one of Fred Jones' traps and unmasked. She then told the gang her evil plan, because she was outraged that she had to work hard to become an astronaut, while everyone else was chosen to go through a lottery. So she dressed as an alien to show the world that space travel was dangerous and then says that she switched the tests and said Shaggy is really the one who scored the highest; much to everyone's shock, including Velma. She then left them all to die, due to the explosives she hid on the resort, and heads back earth alone claiming that returning as a hero would give her all the money she could ever make. However the gang escapes with a second spaceship made Sly's brother Hudson, who planned to use it to return home and the heroes return to earth and confront Shannon by showing the world her confession and she is taken to prison.