"The arcing story this season is about a civil war that is brewing, and that came from a conversation from myself and Bruno [Heller] where we were considering doing V for Vendetta, we were like "that is much a very 80's 90's kind of show, what would it be in the 60's?' What kind of world would be have to create, like in Gotham there would eventually be Batman in this there would eventually be V for Vendetta [Norsefire and V]. So we took that brewing civil war as a stepping stone." – Danny Cannon
"The V For Vendetta world conceptually — it's [like] where this world may or may not end up. What [V for Vendetta creators Alan Moore, David Lloyd and Tony Weare] did so well was to create a [Fascist] version of England that felt like England. It wasn't Nazi Germany imposed on that world. It was very much the parochial, familiar world of England transformed into something dark. That's what we've tried to do, and what [Cannon] did so brilliantly with the visuals, particularly in this season. It's England with this shadow across its face." – Bruno Heller
"One of the few stories that have been told in this kind of world is V For Vendetta [and] conceptually, this [civil war is a] prequel to V For Vendetta. God, I wouldn't hold us up against Alan Moore, but with comic books you have to find a throughline, and that's very political [for Pennyworth]." – Bruno Heller
The Guy Fawkes masks in Pennyworth were definitely intentional, heh. Pennyworth seems to be a prequel to the events of V for Vendetta on some level, probably more so like the comic than the movie. Not saying the comic is canon or anything, though it would be pretty funny if no one mentioned a freaking nuclear war (1988) happening during Gotham (1987-1992). A version of it does take place in this reality I'm sure.