We live in a world where a handful of people (somewhere between 8 and 25, depending on who is counting) have more wealth than 1/2 of the world's population. So, god-like power... maybe not imaginary.
I'm not sure what you are looking for. Don't know what you already know. Don't know how much time you have. But... maybe the philosopher Nietzsche...
These two books deal with power over people in the ancient world. I haven't read them; one of them is on my shelf waiting to be read (the second one).
The Roman Guide to Slave Management: A Treatise by Nobleman Marcus Sidonius Falx 1st Edition
by Jerry Toner (Author), Mary Beard (Foreword) (it is what it is about, but Marcus Faix is a fake name)
Slaves and Masters in the Roman Empire: A Study in Social Control 1st Edition
by K. R. Bradley (Author)
Two contemporary books which discuss the power structure... They are both good discussions of the real world; whether they will tell you much about comic book super heroes, hmmm, maybe not.
The Power Elite by C. Wright Mills - deals with the military, corporate, and political elite of the US in the 1950s
The Higher Circles : The Governing Class in America: G. William Domhoff
More to the point might be these, I found on Amazon
Review of How to Read Superhero Comics and Why by Geoff Klock -- on Goodreads, one review said "This book has a number of very interesting things to say about superhero comics. However, in this work, Klock had his head stuck significantly up Harold Bloom's arse, and fails to stray far from Bloom's theoretical framework." So... maybe yes, maybe no.
Our Gods Wear Spandex: The Secret History of Comic Book Heroes Paperback – November 1, 2007
by Chris Knowles (Author), Joseph Michael Linsner (Illustrator) (This one at least sounds interesting)
Mutants and Mystics: Science Fiction, Superhero Comics, and the Paranormal Paperback – December 21, 2015 by Jeffrey J. Kripal (Author)
Kingdom Come Paperback – September 30, 2008
by Mark Waid (Author), Alex Ross (Illustrator) The Amazon blurb says... "Set in the not so distant future, the DC Universe is spinning inexorably out of control. The new generation of heroes has lost their moral compass, becoming just as reckless and violent as the villains they fight. With Batman retired, Superman in a self-imposed exile and the rest of the Justice League nowhere to be found, it seems that all hope is lost."
Good luck. This should be an interesting project.