7 Theories On How Arrow Will End
3. John Diggle Becomes The Green Lantern (And Carries On Oliver's Legacy)
The idea of John Diggle becoming Green Lantern has existed since the show's early days when fans began voicing their desire to see him put on that legendary green ring. Though it has yet to actually transpire, the Arrow writers haven't been subtle in the Easter Egg department as - from Earth-90 Flash's comment about John's ring to the fact that his stepfather's surname is Stewart - they've dropped a number of hints throughout the show's run that alludes to an even more heroic destiny for Oliver's former bodyguard.
While there's a pretty strong chance we could see an alternate version of John 'Diggle' Stewart surface in Crisis On Infinite Earths, fans are hoping to see the Earth-1 iteration join the Guardians of the Universe before the series concludes so that he can ultimately protect Star City and carry on the legacy that he and Oliver started.
He's been Oliver's hero for years, but could he also have been another hero in hiding the whole time? Let's hope the finale will give us all the answers we're hoping for.