J.K. Rowling has also hinted that there’s a bigger story set to play out in these movies, which has led fans to speculate that Grindelwald’s rise and eventual fall could be story’s bigger arc.
The actual story will center on Magizoologist Newt Scamander, but Grindelwald and Dumbledore have been referenced in the trailers, and are expected to appear in the next movie, with Johnny Depp reportedly playing Grindelwald, and Albus Dumbledore yet to be cast.
Now, there has been no actual confirmation to our knowledge that Fantastic Beasts and Where To Find Them is planning to build toward Dumbledore and Grindelwald’s mega-duel, but there have been hints of the relevance of Grindelwald’s rise to power, and Dumbledore’s eventual involvement in the story.