Louis Leterrier, the director of Marvel Studios' The Incredible Hulk, has revealed new details about an unmade sequel to the MCU Phase 1 film. Released in 2008, The Incredible Hulk was a joint venture between Marvel Studios and Universal Pictures, bringing Marvel Comics' Bruce Banner, a.k.a. the Hulk, into the emerging Marvel Cinematic Universe. Before Mark Ruffalo assumed the role of Banner in 2012's The Avengers, Edward Norton portrayed the gamma-irradiated scientist in The Incredible Hulk, and though there were extensive plans in place, a sequel to the Phase 1 film has yet to be created.
https://screenrant.com/the-incredible-hulk-2-new-details-mcu-movie-lost/