If I'm being brutally honest here, DC wins the SJW battle before it was even a thing despite Marvel always trying to position itself as the winner in the virtue signalling department.
DC went the same route - they just turned Batgirl into a hipster and backed off when people complained because they "turned Starfire into a whore". DC just looked like they were pandering less because they jumped off a cliff during the New 52 reboot, and most of their pandering was just rolling shit back to where they started.
In both cases, the companies are just desperate because comic sales are dying and they need to find new readers wherever they can - and pandering to minorities who previously weren't strong comic buyers seems like an obvious method for doing so. So you get Marvel pushing Black Panther while DC is soaking up praise for Wonder Woman in the film side, while in comics Marvel is pushing black teen girl Iron Man and lady Thor (with the narrator straight-up quoting SJW memes) and making Falcon into the new Captain America, but DC is pushing new Hispanic and Arabic Green Lanterns, and randomly creating "African Batman" and Chinese Superman.
The real problem is, both companies have sort of learned that, while SJWs are incredibly vocal about things they hate, when you do the things they claim to like, they won't actually BUY your books. So Marvel's already officially backed off on the Internet pandering, while DC has sort of quietly phased most of it out. But there's still a push to try and capture new fans, which is why a lot of comic stuff gets retconned just to fit better into the continuity of the popular movies, and why there's still a push in both comics and movies to appeal to the massive Asian audience, and why they'll still push the narrative of how progressive movies like Wonder Woman and Black Panther are, in the hopes that they can parlay those things into future success.
A lot of people like to ascribe ideology to these companies, or say things like "Well, of course stupid younger writers living in a Twitter/Tumblr world are going to reflect those views into their writing", but ultimately, most of this stuff is purely motivated by money, pure and simple. If either company thinks pandering to a specific group is going to dramatically increase their sales, they're going to do it, period.
I feel Green lantern has always been their go to for bringing in a minority character. Makes sense as it doesn't fuck with the lore too much or require some story arc to explain it. there are many lanterns so for a new one to show up is nothing ground breaking.
Didn't they also ret con the original Alan Scott lantern to be gay? Though iirc he's not part of the lantern corps and his lore behind his powers is quite different ---
Cid- "looks like that overgrown lobster just got served!" Bartz-"with cheese biscuts AND mashed potatoes!"