I wonder if the US on Earth 2 was smaller or larger after the war the Americas, that conversations like this would be very different.
"Nope, California is part of Mexico now."
IN JLA/Avengers the DC heroes note that the DC Earth is larger to fit all of their fake cities/countries. Marvel has a few, but less than DC, so one can assume that the Marvel Earth is larger than Earth Prime.
Flasher is not a hero I'd want to run into in public.
Fred Hembeck already went there.
I'm surprised no one has made the Spartan connection yet. Maybe it's a 90s thing, but to me it instantly jumped out that John Spartan = Demolition Man. As such, I'm not REALLY sure it's something that will stick - if for no other reason that the DC licensing folks would have a field day clearing the naming rights.
Warner Brothers owns DC comics. Warner Brothers produced Demolition Man. Hence why the adaptation was published by DC comics.
As for where Star/Starling City is, I did notice that they used the Boston skyline in this week's episode. I clearly saw the Pru (Prudential Building) and the Hancock building. It's been 12 years since I've lived in the Boston area, but those buildings are immediatley recognizable.