If they return, who would be member and why?

What do you mean?

>Original line-up minus Xavier
>Cyclops
>Carol
>Captain Britain
>Winter Soldier

Originals with Professor X replaced by Jean Grey.

Cabal
Maker - WHISPER multiversal super science
Moondragon - Knowhere Corps and the Titanian Eternals
Namor - Atlantis
Dracula - Vampire Nation
Hela - Asgard

Illuminati:

X
Iron Man
Namor
Black Panther
Cyclops

Cabal

Maker
Namor
Doom
Zemo
Maximus

So why is he evil now?

Because 2020 is coming and becoming Iron Man 2020 was always his fate.

Feminist Illuminati

Carol Danvers
Emma Frost
Scarlet Witch or Magik
Valeria Richards
Shuri
She-Hulk
Iso

Their entire story arc is about overthrowing the marvel patriarchy the end result of which has the entire marvel multiverse about to be destroyed, paving the way for the next big marvel event to be named later

bring back wendell vaughn

Has anyone saying Black Panther read a Black Panther title recently? Did they even read Hickman's run? Or the original Illuminati title? T'Challa was against it from the start and is against it again. He was the only one of the Illuminati who took the criticism to heart, it's why he tapped Blue Marvel when Carol wanted to form the Ultimates. The Ultimates was supposed to be their above-board Illuminati.