Both Shazam and Captain Marvel received their first solo movies this year, but the rights surrounding the name of the latter have always been, well, complicated, especially since Shazam used to be called Captain Marvel.

In Marvel Comics, a lot of different people have held the title of Captain Marvel. However, Billy Batson -- originally appearing in Fawcett Comics -- went by the name from his creation in the Golden Age. By the time the New 52 rolled around, DC Comics, who had once sued Fawcett Comics due to the character's similarities to Superman, had acquired the rights to the hero and changed his name entirely to Shazam. Marvel definitely got litigious in regards to the use of Captain Marvel as a name.

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Check out the video below for more on the history of Captain Marvel and Shazam.

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Directed by David F. Sandberg, Shazam! stars Asher Angel as Billy Batson, Zachary Levi as Shazam, Mark Strong as Dr. Thaddeus Sivana, Djimon Hounsou as the ancient wizard Shazam, Grace Fulton as Mary Bromfield, Jack Dylan Grazer as Frederick “Freddy” Freeman, Ian Chen as Eugene Choi, Jovan Armand as Pedro Peña, Faithe Herman as Darla Dudley, Cooper Andrews as Victor Vásquez and Marta Milans as Rosa Vásquez. The film is in theaters now.

Directed by Anna Boden and Ryan Fleck, Captain Marvel stars Brie Larson as Carol Danvers, Samuel L. Jackson as Nick Fury, Jude Law as Yon-Rogg, Clark Gregg as Phil Coulson, Lee Pace as Ronan the Accuser, Djimon Hounsou as Korath the Pursuer, Gemma Chan as Minn-Erva, Ben Mendelsohn as Talos, Lashana Lynch as Maria Rambeau, Algenis Perez Soto as Att-Lass, McKenna Grace as a young Carol Danvers and Annette Bening as the Supreme Intelligence. The movie is in theaters now.