I'm not a big fan of McGregor but similar to Killmonger, i think there's a lot of potential to take a lot of the villains from that era (by him and other writers) and give them a modernized spin. The villain group called
the supremacists for example lol
Barricade - force fields like the invisible woman
Voortrekker - tracker like kraven, martial arts/weapons expert
White Avenger - Alt-right superman. super strength, flight, durability, hyper senses, x-ray vision, team leader and one of the good ol boys
Hungyr - drains energy by touch like rogue, needs to do so to stay alive like a vampire
Captain Blaze - essentially human torch abilities
Harrier - 3rd rate iron man suit, with electrical and projectile weapons
These guys are basically Black Panther's "sinsister six" from the 80s. iirc BP pretty much took em all down using his wit, intelligence and environment; divide and conquer ish.
If they change the name of the group to something more subtle and a different code name for "white avenger" , the rest of them would be an easy adaptation.. and would show some great powers and great feats for BP in how he beats them all.