Arrow: How Crisis On Infinite Earths Can Make John Diggle The Green Lantern

The most recent Arrowverse crossover, Elseworlds, includes a nod to the long-running fan theory that Arrow's John Diggle is destined to become the Green Lantern. The moment was a neat Easter egg, but when combined with the reveal of the next Arrowverse crossover - Crisis on Infinite Earths - it may hint at a way for Diggle to really become the Green Lantern.

The moment comes in Arrow's episode of Elseworlds when the heroes receive a visit from the Barry Allen of Earth-90 (John Wesley Shipp reprising his role from the 1990s The Flash TV show). He comes to warn them of a terrible threat destroying Earths throughout the multiverse, but when he first arrives, Barry spies John Diggle among the group and says: "Hello, John. You're not wearing your ring... Things must be different here."

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Immediately, fans recognized the line as a reference to the popular theory of Diggle becoming the Green Lantern and its inclusion has renewed interest in the idea. Plus, now that the next crossover has been revealed as Crisis on Infinite Earths - an event that in the comics does have reality-altering consequences - there now exists a path for Diggle to actually become the Arrowverse's Green Lantern.

John Diggle Has Been Rumored To Become Green Lantern

Arrow John Diggle

The theory that John Diggle could one day wield a Green Lantern ring isn't anything new. In fact, it's probably one of the most popular theories to spin out of the Arrowverse. It all began with the many Green Lantern Easter eggs that crop up in both Arrow and The Flash, references to things like Ferris Air and a missing pilot. These clues, however, hint at the Hal Jordan version of Green Lantern and not the one Diggle most resembles. Still, these little winks and nods were enough to send fans looking for a way that at least one of the Green Lanterns could join the Arrowverse.

Enter John Diggle, a man who regularly demonstrates the fearlessness required to wield a ring and whose military record makes him a strong candidate to become the Arrowverse version of John Stewart - former Marine and eventual Green Lantern of Sector 2184 (aka Earth). Actor David Ramsey even threw fuel on the fire when he confirmed there had been a "serious discussion" on the topic of John Diggle being John Stewart and/or becoming a Green Lantern. Since then, however, Arrow executive producer Wendy Mericle seemingly shot down the Diggle-becomes-Green-Lantern theory when she confirmed that Green Lantern could never come to the Arrowverse. And yet, Green Lantern has joined the Arrowverse (sort of) thanks to Elseworlds.

Elseworlds Already Made John The Green Lantern (Sort Of)

John Diggle as John Stewart (Green Lantern) Fan Art
Fan Art by Erkan Bahadir

The brief moment of Earth-90's Flash recognizing John Diggle as a Green Lantern is a great nod to the fans, but it also officially confirms that there is at least one Green Lantern in the multiverse - and he shares Diggle's face. So, in a way, the Arrowverse has already gone ahead and made John Diggle (or Stewart, as the case may be) a Green Lantern, confirming the fan theory on one Earth while continuing to play coy about it on another. Plus, were any of the Arrowverse shows to ever visit Earth-90, it would only stand to reason that Ramsey would portray that Earth's John Diggle/Stewart and finally get to don the Green Lantern ring and costume.

Sadly, it appears that Earth-90 is destroyed during the Elseworlds crossover, so a visit to that Earth isn't possible until it's somehow restored. In which case, Arrowverse fans might never get to see Ramsey as Earth-90's Green Lantern and will just have settle for the Elseworlds shout-out. That is, unless the next Arrowverse crossover - Crisis on Infinite Earths - holds the secret to how John Diggle can finally become a Green Lantern.

Page 2: How Diggle Can Become Green Lantern & What This Could Mean For Arrow's Future

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