Taking a look at May 2018 with the only blockbusters being Infinity War and Han Solo. I think it's fair to say Disney dominates the marketplace. No studio wants to put a tentpole in between those two. I think the reason why IX is slated for May 2019, is for Disney to scare off competition for IW2 and then move it after Jedi's performance.
Mulan doesn't have a release date yet. However it was on its 2019 slate, so it's either November 8th (which will likely move to November 1st) or December 20th.
The type of film The Star is a $35M-$60M result domestically minimum due to the built in audience. Again I think the teaser was an attempt to attract the GA but then again the guy who wrote Open Season 4 wrote it.
Son of a bitch...
www.variety.com/2017/film/news/emoji-movie-2-release-date-302784978/
An Emoji Movie sequel was dated for 12/25/19. Tony Leondis is to return to both write and direct. Interestingly Micheal McCullers (from Boss Baby and Austin Powers) has been added on to write. T.J. Miller is confirmed to reprise his role as Gene.