So a bunch of supervillains (12) conquer Europe and North America.

>>54322972
Shortly after the conquest if you're focusing on a hammy adventure to defeat the evil supervillains and put an end to their domineering ways and their foul evil.

Have existed for some time if you're looking for a little bit of sympathy, as by that point a large portion of the 'empire' has likely acclimated to their dominion and possibly views it as better than their previous regime. Maybe it is.

So are you playing it straight black-and-white or are you after shades-of-grey deconstruction?

>>54323033
Shades-of-grey.

>>54323065
Then go for the second option. As for the villains themselves, I'd make at least some of them use rather stereotypical superpowers.

>The unstoppable force and the immovable object, all in one. Almost invulnerable, while also being the strongest man alive.
>The smartest man alive, possessing all manner of tech of his own design that he uses to elevate himself above baseline humanity.
>A telepath of impossible magnitude, able to read, dominate and destroy the minds of literally millions over a vast range.

Etcetera. Maybe have one or two be particularly unique but I think you have more to play with if you go with the stereotypes and subvert some of them, especially if you're going shades-of-grey with this.