Marvel Comics fans are used to the Avengers lineup changing every so often. In the fall, an "all-new, all-different" Avengers will debut, this time with a new wrinkle that marks the company's latest push for more diversity within its pages.

"I like the fact that we ended up with an Avengers team with one white guy on it," said Mark Waid, who will be writing the new Avengers series.

That...