<p>I think that “Aurelius” is a name that Grindewald gave Credence to make him think that he knows his identity. Grindewald probably did this to get him on his side as he is the one who told him what his “identity” is. Of course, in FB3 Credence is probably going to discover that the identity that Grindewald gave him is fake and he’s going to get devastated and return to the broken person he used to be. </p><p>
</p><p>I read a really good fan theory (I don’t remember who wrote it) but they said that the raven turned into a Phoenix until AFTER Grindewald touched it, and it turned into a Phoenix because he shared a blood pact with Dumbledore, which proves that Credence is not related to Dumbledore.</p><p>
</p><p>Also, not only did J.K. Rowling completely go against canon with the entire McGonagall thing, but near the end of the movie Jacob can SEE Hogwarts (note his amazed face). And in the books (or Pottermore) it said that Muggles cannot see Hogwarts, all they see are some castle ruins and a sign that says “Danger, Do Not Enter” (or something like that), so how come Jacob can see Hogwarts? </p><p>
</p><p>EDIT: I’ve been informed that Dumbledore was, in fact, not 87 during Crimes of Grindewald, he was around 46.</p>