Thing is, Fawcett probably changed the name of their Gotham in order to avoid another Suit with National. Keep in mind they barely got out of that predicament the first time.Ed Herron
Herron joined Fawcett Comics in 1940, eventually becoming the company's executive editor by 1942. With artist Mac Raboy, he created Captain Marvel Jr. in Whiz Comics #25 (Dec. 1941), and with Jack Kirby he created Mr. Scarlet in Wow Comics #1 (Winter 1940-1941) and Pinky the Whiz Kid in Wow Comics #4 (Spring 1942). It was in the Mr. Scarlet story in Wow Comics #1 that the name "Gotham City" first appeared in the comics. Comics historian Greg Theakston notes that this pre-dates its name as such in DC Comics' Batman #4. During this period, Herron wrote for such Fawcett titles as Captain Marvel Adventures and Captain Marvel Jr..