There'd better be a pterodactyl flying around. Disney said it has struck a deal with James Cameron to build Avatarrides and attractions in its parks. It will start with a themed land at its Animal Kingdom in Orlando. Groundbreaking for that project will start in 2013, and the attractions will open in 2017, for an estimated $400 million. Cameron said there might be attractions that are based on two possible sequels planned for release in 2014 and 2015.