It helps that Amell looks sad in that picture, and also that those of us that watched Arrow are well acquainted with him looking miserable at most times.
my first thought was that he looked a bit like Paul Walker with a thicker beard. Something about the eyes.
maybe I don’t see the Amell resemblance because I’ve always hated Stephen Amell? (no particular reason, it’s just every once in a while there’s an actor who rubs you the wrong way. Amell is one of those.)
Looks like hes been hanging out for the last 5 years between Quel’Thalas smoking “bloodthistle” and drinking at Brewfest in Orgrimmar with the goblins & burned his hair off in a drinking game “Oooh he’s on fire!”