Perhaps the ending could be left less cliffhanger-y (since Disney has the rights to the franchise) and leave some of that for what they hope will be a second movie in Children of Vengence and Virtue. In order to get to that second movie, Disney and LucasFilm have to realize that they need to make a good movie that on it's own, earns itself a second movie by doing well at the box office.
Personally, I actually think Disney is making a mistake by making this a movie instead of a Disney+ franchise, however they inherited Children of Blood and Bone in the Fox purchase (it was to be a Fox 2000 release), so I bet there's contractual language that says this has to be a movie.