In the jargon of the media-industry, "development hell" (or "development limbo") is a period during which a film or other project is trapped in development. A film, television program, screenplay, computer program, concept, or idea stranded in development hell takes an especially long time to start production, or never does.
The film industry buys rights to many popular novels, video games, and comics, but it may take years for such properties to be successfully brought to the cinema, and often with considerable changes to the plot, characters, and general tone.
It looks like it,
John Carter, based on Edgar Rice Burroughs' Barsoom stories, was mired in Development Hell since 1931, as almost every major studio in Hollywood tried and failed in putting a film together. At various points in the 2000s, Robert Rodriguez, Kerry Conran, John Favreau, and Brad Bird had been attached to direct the project. In 2006, Disney acquired the rights after Paramount's attempt at filming it failed, Paramount having acquired the rights from Touchstone (a Disney company) in 2002. Actual filming began in January 2010, and was released in March of 2012 — just in time for the 100th anniversary of the first published John Carter story (a DVD extra is even titled "A Century Into Making"). TheMockbuster version by The Asylum actually came out a full three years before the official adaptation did.
Dont blame me for having no faith in Ryan Reynolds making this movie anymore, i mean if this movie didnt star filming before Avengers 3, it means is so damn dead in a pool.