I was going to make this fun(ny) but I have to dash so here is the basic setup. Cyborg Superman runs through my list (below). Everyone in character. Cyborg must defeat his opponent to pass on, simply surviving because you can't really kill him isn't enough. Battle location changes every round so the defenders all have home court advantage in their own kingdoms and Henshaw gets the option of a fresh body after every battle. Feel free to discuss among yourselves any aspect of this battle and think of things in the way that makes the most sense. Modify as needed to make it most interesting/challenging. Other than the order. I know it doesn't make sense to you. Meh, you can mess with that too. And so questions of motivation are covered, to the defenders, Henshaw is invader looking to destroy all they hold dear, and for Henshaw, he is fighting for a reward of true death. Anything less than that will have him live forever as Superman's toilet.
It finally dawned on me that there's a certain kind of character I like more than any other. That class or category is best described as a "warlord". These characters are all, to some extent, leaders of men (or demons, aliens and what have you), and not just in battle (but especially in battle). Warrior rulers, regal warriors, something along those lines. There are characters that I like a lot that don't fit this mold, but most of the characters I like a lot, do. And it's ordered in a vague sort of gauntlet.
|1. Black Panther|
Former King of Wakanda. Current King of the Panther's City of the Dead.
King of Atlantis. Also, the bedroom.
Ruler of Limbo.
|4. Jack Hawksmoor|
He was the president!
|5. Black Bolt|
King of the Inhumans and one-time leader of the Kree.
|6. Doctor Doom|
Ruler of Latveria.
Huge empire spanning both space and time.
Emporer of the Shi'ar.
Occasional ruler of Asgard.
|10. Black Adam|
Ruler of Khandaq.
One-time dictator of Korugar and leader of the Sinestro Corps.
He's got a whole planet.
Conqueror and unquestioned ruler of 9 galaxies.
|14. Mr. Majestic|
Leader of the Kheran army and ruler of Hawaii.