The Hub City of DC Comics is a pretty corrupt place; assuming that Oliver won’t decide to just export a couple of his newbies to clean the streets, he could actually support a birth of a new superhero in Hub City.
Of course, there’s no saying which version of Vic Sage would turn up if he does indeed appear.
Oliver could encounter a pre-Question Vic Sage and push him toward the path of fighting crime as a vigilante.
Hub City has been visited on Arrow and Legends of Tomorrow without any mention of a faceless fighter, although Arrow seems to love taking breaks from the Oliver Queen action to craft origin stories for other heroes.