If that were the case, that would basically mean they would probably skip the Moro and Granolah arcs adaptation.
That could be kinda unpractical if they were to introduce the characters in games and merchandise later on.
First to bring an animated story that's first set after and then before Granolah, it's very confusing for people (anime only fans) that aren't following the manga. I don't see them take a step back in the chronology after the next movie.
If they were to adapt Moro and Granolah, best chances are the movie is a direct sequel to Broly, with a pretty descent chance Broly will reappear (as a side character), as was being set up / teased at the ending of the last movie.