4) Credence Returns
Another person whose fate is left somewhat open-ended by the end of Fantastic Beasts is Credence Barebone. Though he was a somewhat nebulous character in this movie, he has a lot of potential to be a riveting villain in future installments.
As played by Justice League‘s Ezra Miller, Credence is one of the Second Salemers, a group of witch-hating extremists. Really, though, Credence is the son of a witch and has inherited magic. But having been abused both physically and emotionally by his adoptive mother has made his magic turn inward and dark – to the extent that it has grown into a separate parasitic entity.
This is a new concept for the Potterverse, called an Obscurus (as the receptacle of the Obscurus, Credence is an Obscurial). By the end of the film, he’s apparently been blown to bits by the combined forces of the MACUSA. However, one brief shot sees Newt watch a single airy tendril of the Obscurus drift away.
This and Miller’s growing career heavily suggest to us that Credence will return. As Grindelwald showed a great interest in the boy in the movie, you can bet that he plans to use Credence as his ultimate weapon in his war against the muggle world.