>“One of our strategies is to take our diamond characters — which is Batman, Superman, Wonder Woman — and we use them to prop up other characters that people don’t know,” explained Gunn.

From the sounds of it, this is a little intentional. They're using "Chapter One" to introduce lesser-known characters, and then presumably they'll be able to bring more characters that have not been done to death to the forefront.

But really, between Creature Commandos, The Authority, Booster Gold, and Waller, I'd say they're already doing a decent job at not focusing entirely on the most known characters. Plus, James Gunn indicating they're exploring all of DC's imprints certainly opens the door for some interesting things in the future.