They also provide an opportunity to showcase investigative reporting. But yeah, a big(ish) mob war style story in Metropolis would be a cool way to make it feel a little more grandiose. A well written modern story of back door shenanigans, backstabbing and intrigue not unlike the Godfather would be cool. Personally, I thought the Invisible Mafia was enjoyable and kind of getting there. One of the things I did like from Bendis.