>>42295921
>Oddly Sunset was missing entirely from this movie when even in DoTL she was, for unknown reasons, in the credits.
I think the movie credits do hint at future plot threads but they aren't necessarily in the next immediate movie. Like for example Rarity holding AJ's head. I think Applejack will die or near die at some point and it will cause Rarity to go crazy.
>>42295930
Having some at least tangentially relevent role in the plot.
I mean she showed up in the last movie hanging out with Chrysalis.