Miles Morales say hi.
Marvel could take Living Lightning and make a hit movie out of him so quick DC wouldn't know what hit them. They made ANTMAN a movie hit TWICE.
Because it's EASIER to sell Black Canary merchandise than Vixen. Yes it's a black one but it still benefits the original one. Who has a TON of stuff in trade.. The fact that WB has changed the ethnicity of white characters while ignoring Vixen is ridiculous. They have a character with massive potential right there but they’d rather make Black Canary black.
Look at Legion. How may significant stories were done with all the black characters? Very little-so thus you get race changed white heroes.
Also it FORCES the writers to use that black character in a book or series. Because most are NOT going to waste time building up or using that original black character.
And I am sure if anyone brings up Vixen-the FAILURE of Catwoman is used to stop that conversation. Meanwhile Vixen fans have to look at the success of Moon Girl, Shuri, Riri & even Ms Marvel.