Many people think the Black Panther movie which came out February 13th is the first superhero movie with a black lead.
Actually there were three Blade movies staring Wesley Snipes, from 1998 to 2004. Blade is a Marvel hero. There was also a Steel movie based on a black DC Comics hero, and Will Smith stared in Hancock a superhero invented for the film. Furthermore, Catwoman had a black female lead, Halle Berry.
The Marvel cinematic universe has featured many black heroes, Nick Fury the leader of Shield, Falcon, War Machine, and the Norse God, Heimdall. The X-Men features Storm a black woman, and the DC Extended Universe included Cyborg in the Justice League movie.
African Americans are over represented in superhero movies, though not to the degree that they are over represented in professional sports. There are also many African Americans in the entertainment industry, and they have had success in politics.
Hogan the Grim is an Asian who was featured in the Thor movies, other than that I can not think of an Asian superhero in live action movies. Asians are almost non-existent in professional sports, rare in the entertainment industry, and largely invisible in politics.
Yet the median household income of Asians lead that of whites by about 9% in 2014 according to Pew, while the median household income of whites lead blacks by about 65%.
Success in sports, entertainment, politics, and superheroes does not translate into rising median household income for your sex, race, ethnic group, etc.
The conservative trickle down theory, give money to the rich, and it will trickle down to the poor, has failed.
The liberal trickle down theory, give prominent positions to minorities and it will result in the general economic success of the group has also failed.