Have you heard? Miles Morales (African American and Puerto Rican) takes over for Spider Man in the Marvel comic series. He currently has appeared in 90 issues. It will be interesting to track how they portray Miles’ mixed story with an extra layer of super hero.
You can read more about his character, here on Comic Vine: http://www.comicvine.com/miles-morales/4005-79420/
And here in an article written by mixed author Marcia Dawkins: http://www.huffingtonpost.com/marcia-alesan-dawkins/marvels-mixed-race-ultima_b_917442.html