Walt Disney has announced a $1bn equity investment in OpenAI, enabling the AI start-up’s Sora video generation tool to use its characters.Users of Sora will be able to generate short, user-prompted social videos that draw on more than 200 Disney, Marvel, Pixar and Star Wars characters as part of a three-year licensing agreement between OpenAI and the entertainment giant.A selection of the videos made by users will also be available for streaming on the Disney+ platform.Bob Iger, Disney’s CEO, hailed a deal ...