It is revealed that Credence Barebone (Aurelius Dumbledore) is actually the son of Aberforth Dumbledore , making him Albus's nephew rather than his brother.
Set in the 1930s against the backdrop of rising fascism in the wizarding world, the plot centers on Gellert Grindelwald’s attempt to be "legitimately" elected as the Supreme Mugwump.
For the first time on screen, Dumbledore’s romantic past with Grindelwald is explicitly confirmed. Lines like "I was in love with you" anchor the emotional weight of their conflict.
The movie delivers on its title by finally exploring the dark corners of the Dumbledore family tree:
The group includes Newt’s brother Theseus, the brave Muggle baker Jacob Kowalski, and the brilliant Professor Lally Hicks. 2. Secrets Revealed (Finally!)