'Fantastic Beasts' sequel has found Newt's war hero brother

How do you sustain a franchise for five installments? By introducing the protagonist's family! 
(This is the fool-proof formula behind such hits as The Lion King II, The Little Mermaid II, and more relevantly, Harry Potter and the Cursed Child).
For its upcoming sequel, the Harry Potter spinoff Fantastic Beasts may have found Newt Scamander's (Eddie Redmayne) brother Theseus in British actor Callum Turner, Mashable has confirmed.
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