New Vigilante Coming to Star City in Season 5 of "Arrow"
Team Arrow went their separate ways at the end of the season 4 finale, but a new character may step in to fill their void. While very few character details have been revealed, we do know the new character is a "cocksure/reckless ex-Marine turned vigilante.”
It wasn't revealed in the TV Line report if this new character is an ally or adversary to Mayor Oliver Queen and /or the Green Arrow. It will be interesting to see if Diggle and this new vigilante crossed paths during their time in the military. However, that is pure speculation on my part.
Arrow's season 5 premiere date has yet to be announced.
Source: TV Line