Do we even know what current continuity looks like, to work the Everett clan into it?
I dunno what I'd do. I'm torn. We know the powers are passed down through the family and there's at least two branches of the family tree, and they're primarily located in the South. We know the OG Amazing Man was a civil rights activist with only MLK and Malcom X considered more influential, and his ID was revealed to the public by Hoover. We know Marcus did a lot of work to help New Orleans recover after hurricane Katrina. I think we could keep all that, and the broadstroke elements of Amazing Man history, intact. Maybe the 90's version didn't die in the same circumstances with the same characters in the same story, but the broadstrokes we could keep.
So obviously there's tons of room to build a big, close-knit clan, in classic Southern style, around all this legacy of activism. That covers a huge chunk of the supporting cast and plays into the IP's scant established themes. And I like the idea of throwing these people together and letting them bicker. But a black superhero making commentary on black people? It's the go-to troupe for every black superhero out there. Even the space cops make this kind of commentary and they don't even live on earth!
And I don't know what it is, but there should be some kind of narrative-heavy "important thing" thread running through this family, at the source of their powers. I don't know what, some kind of quasi-science-y thing, another unifying force like gravity, nuclears, or speed force or...I dunno what, but something important that the family is intrinsically tied to, something bigger than us. But that's just me and my love for high-concept science fantasy. Not magic/voodoo or a African mythology, but something.