Unlike Rogue One A Star Wars Story which had a lot of mystery surrounding it and had the fandom guessing, this basically does what it says on the tin.
The announcement came from (replacement) director Ron Howard on his twitter feed, via a video, he also announced they had wrapped filming.
Hey #Twitterville we just wrapped production so here's a special message #StarWars pic.twitter.com/8QJqN5BGxr
— Ron Howard (@RealRonHoward) October 17, 2017