BURBANK, Calif. (Reuters) - Walt Disney Co on Thursday said its new family-friendly streaming service will cost $7 monthly or $70 annually with a slate of exclusive TV shows and movies from some of the world?s most popular entertainment franchises in a bid to challenge the digital dominance of Netflix. FILE PHOTO: Disney characters Mickey Mouse and Minnie Mouse attend the 25th anniversary of Disneyland Paris at the park in Marne-la-Vallee, near Paris, France, April 12, 2017. REUTERS/Benoit Tessier/File Photo The ad-free monthly subscription called Disney+ is set to launch on Nov. 12 and in every major global market over time, the company said.