http://www.techradar.com/news/fable-4-release-date-trailers-and-features

Despite being one of Microsoft’s most beloved exclusive IPs, Fable is a franchise with a very troubled history and we haven’t seen a mainline installment since Fable 3 was released in 2010. 

After an unsuccessful attempt to pivot to an online games-as-service model with Fable Legends, followed by the eventual closure of developer Lionhead Studios, many thought we’d never experience another traditional single-player Fable adventure.