20 DC Characters Who Could Yet Appear In Arrow And The Flash

3. John Stewart

Superman Harley Quinn
DC Comics

This one is more of a curve ball, for one train of thought suggests that John Stewart has been a long-standing member of Arrow since the very start.

Many fans have speculated that David Ramsey’s John Diggle could actually end up being revealed to be John Stewart. Ramsey himself has even talked up about how the idea has been discussed.

Green Lantern has been long-rumoured to be a part of Arrow at some point in the future, with Ferris Air even referenced in both Arrow and The Flash. It’s just that most people presumed that any Green Lantern appearance would be Hal Jordan. But maybe that’s not the case after all and it’ll actually be John Stewart who is the GL to make his presence known.

Given how Stewart is a former military man, it’s definitely plausible that Diggle could be worked into the John Stewart mould if Arrow decides to go that route.

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