When asked by ComicBook.com about whether or not he'd like to play John Stewart on Arrow, Ramsey coyly responded, "Is John Diggle John Stewart? I cannot say 'yes,' and cannot say, 'no.'"
This theory could in fact be the truth
John Stewart left home to enlist in the United States Marine Corps at a fairly young age. Relatively little is known of John's military service.He has always been the quiet type and only thing we know about him is that he did a mission in Afghanistan for ARGUS.
What if his secret identity he changed it to John "Diggle" instead of "Stewart" to come back to Starling City and work for Oliver queen.
Could this be another Spin-off for CW's ARROW ,which brought about Flash,Arrow and is going to bring out ATOM soon enough
He added by saying....
"Here’s the truth of it: if I knew, I would tell you I knew and I’m not at liberty to tell you that. I probably wouldn’t tell you anyway! I would at least tell you that I know. But I honestly do not know."
How Awesome would it be if this could be replicated !!!?? Diggle is one of my favourite characters on the show , seeing him become the John Stewart we know would make me so happy.I Actually do wish this happens and even if CW don't have this in plan...well now they should do it!!