Passage: Legendary Entertainment confirmed at the July 2014 San Diego Comic-Con International that it had acquired the licensing rights to Mothra, Rodan, and King Ghidorah from Toho and revealed concept footage with the closing title cards reading "Conflict: inevitable. Let them fight". In September 2015, Legendary announced that the film Kong: Skull Island would not be developed with Universal Studios. Instead, it would be developed with Warner Bros., which sparked media speculation that Godzilla and King Kong would appear in a film together.In October 2015, Legendary announced plans to unite Godzilla and King Kong in a film titled Godzilla vs. Kong, set for a 2020 release date. Legendary plans to create a shared cinematic franchise "centered around Monarch" (the secret government agency which debuted in 2014's Godzilla) and that "brings together Godzilla and Legendary’s King Kong in an ecosystem of other giant super-species, both classic and new". Later in October, it was announced that Kong: Skull Island would have references to Monarch.In May 2016, Warner Bros. announced that Godzilla vs. Kong would be released on May 29, 2020, and that Godzilla: King of the Monsters would be pushed back from its original June 2018 release date to March 22, 2019, however, the film was later pushed back again to May 31, 2019. In October 2016, Legendary announced that Godzilla: King of the Monsters would be filmed at its parent company Wanda's Oriental Movie Metropolis facility in Qingdao, China, along with Pacific Rim Uprising. That same month, it was revealed that Legendary was planning a writers room to create their Godzilla–Kong cinematic universe, with Alex Garcia overseeing the project for Legendary.In early January 2017, Thomas Tull, founder of Legendary, resigned from the company but would remain as producer for the Godzilla–Kong series, which was revealed as the "MonsterVerse". In March 2017, Legendary assembled a writers room to develop the story for Godzilla vs. Kong.

Question: When was the acquisition of licensing rights confirmed?
July 2014