Aside from movies, Marvel/DC is pretty guilty for this as well.
For example, we have black superheroes (Miles Morales, Black Panther, Luke Cage, Falcon, John Stewart, Cyborg, etc..) but where are all the Asians?
Off the top of my head, the only prominent asian superhero i can remember is Shang-Chi and Katana.
This also doesn't even say much considering how obscure they are compare to most of the black superheroes that are definitely more well-known.
Marvel: Shang Chi, Special Agent Jimmy Woo (Agents of Atlas), Amadeus Cho (The current Hulk), Sunfire, Jubilee, Colleen Wing, Nico Minoru (Runaways), Karma, Jolt
DC is a bit harder off the top of my head and New 52 got rid of a few of them, like Ryan Choi (Atom). Katana, Shado, Cassandra Cain, The Ray are all I got, and the Cain just rejoined continuity. There's the new Superman coming soon and I believe the Great Ten will return in that book as well.
That's Asian as Japanese, Chinese, Korean, which is incorrect though.
And yes, they are less prominent than some of the black heroes.