We're learning a lot about the Harry Potter universe through the Fantastic Beasts films. One of the biggest revelations came at the end of Crimes of Grindelwald when we found out that Albus Dumbledore has a long-lost brother. Previously, we thought this character was just Credence Barebone, a Muggle-raised wizard with incredible powers. Now, the massive twist has fans wondering what else J.K. Rowling has planned for this character, and we thought it could be fun to do a little digging ourselves. Since we'd never leave you out of the nutty fan-theories we came across, we also thought we'd list them here.