Crossover (fiction)A crossover is the placement of two or more otherwise discrete fictional characters, settings, or universes into the context of a single story. They can arise from legal agreements between the relevant copyright holders, unofficial efforts by fans, or common corporate ownership. This is different from a spoof, where one discrete character, setting, or universe, copies another character, setting, or universe, often in a comedic manner.
TransformersTransformers is a media franchise produced by American toy company Hasbro and Japanese toy company Takara Tomy. It primarily follows the heroic Autobots and the villainous Decepticons, two alien robot factions at war that can transform into other forms, such as vehicles and animals. The franchise encompasses toys, animation, comic books, video games and films. As of 2011, it generated more than ¥2 trillion ($25 billion) in revenue, making it one of the highest-grossing media franchises of all time.
Parallel universes in fictionA parallel universe, also known as a alternate universe, parallel world, or alternate reality, is a hypothetical self-contained plane of existence, co-existing with one's own. The sum of all potential parallel universes that constitute reality is often called a "multiverse". While the five terms are generally synonymous and can be used interchangeably in most cases, there is sometimes an additional connotation implied with the term "alternate universe/reality" that implies that the reality is a variant of our own, with some overlap with the similarly named alternate history.
Fictional universeA fictional universe is the internally consistent fictional setting used in a narrative work or work of art, most commonly associated with works of fantasy and science fiction. Fictional universes appear in novels, comics, films, television shows, video games, art, and other creative works. A fictional universe may be an alternative version of the real world, differing only in the particulars of the story.
Retroactive continuityRetroactive continuity, or retcon for short, is a literary device in which facts in the world of a fictional work which have been established through the narrative itself are adjusted, ignored, supplemented, or contradicted by a subsequently published work which recontextualizes or breaks continuity with the former. There are various motivations for applying retroactive continuity, including: To accommodate desired aspects of sequels or derivative works which would otherwise be ruled out.
Stan LeeStan Lee (born Stanley Martin Lieber ˈliːbər; December 28, 1922 – November 12, 2018) was an American comic book writer, editor, publisher, and producer. He rose through the ranks of a family-run business called Timely Comics which would later become Marvel Comics. He was the primary creative leader for two decades, leading its expansion from a small division of a publishing house to a multimedia corporation that dominated the comics and film industries.