John Diggle Jr. (Arrowverse Earth-1)

John Diggle Jr. is a supporting character in the CW/DC television Arrowverse series, debuting in Arrow. He is the son of Lyla Michaels and John Diggle, the twin brother of Sara Diggle, and the adoptive brother of Connor Hawke. 
In the erased future, JJ was the supervillain Deathstroke and Mia Queen's arch-enemy after killing her best friend, Zoe Ramirez. 
In the new multiverse's potential future, he is engaged to Mia Queen and was unaware of his past life as Deathstroke until a mysterious figure restored his memories.
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