The very first thing we see in the brand new Fantastic Beasts trailer is Dumbledore teaching Newt Scamander the very same lesson, dealing with a Boggart and the Riddikulus charm, that Remus Lupin teaches Harry Potter decades later.
While at first glance this appears to simply be a nod to the original Harry Potter series, I believe it represents a much deeper story that connects mentors and students across generations.
