My ears were burning.
I've had a few thoughts on Gateway City.
I'd rename it
San Entrada, to give it different initials than Gotham City.
I'd simplify things and have Diana Prince be her government name, so she can collect a paycheck working as a Humanities adjunct at west coast Ivy League
Marston University. The campus grounds would also feature the elite
Marston Academy, a college-prep boarding school, where young heroes like Robin, Miss Martian, Static would secretly live, learn and train. Instead of having a Holliday College for girls, the Academy would have two dormitories: girls would be housed at
Holloway, boys at
Byrne. Marston's campus flag, with a block "M" would be inverted occasionally to honor their celebrity superhero "W"onder Woman.
San Entrada would be a mess of a wild variety of architecture, with a downtown featuring hundred-year-old Art Deco skyscrapers, like its sister cities Gotham and Metropolis. Situated around a Entrada Bay, the city is divided into several boroughs separated by rivers and connected by several bridges; the largest bridge connecting the far side of the bay. It's beams and cables form another "W".
The center of Entrada Bay is a haunted island permissable only to those of the Ohlone tribe of native Americans. Their god
Kaknu sleeps there, and accepts tribute.
The city reaches into the Redwood forest, up the mountain side, and even under the bay itself, where immigrants from the nearby Pacific colony of Atlantis have created a queendom under the cruel rule of Clea.
The city is also home to the Hall of Justice, where citizens can visit and engage with visiting heroes, and hear speakers from around the world.