I’ve researching Ming the Merciless ahead of using him in a tabletop RPG but the last reference to him online is " Flash arrives at Bravor’s headquarters and quickly overpowers Ming" whereupon Flash, Dale, and Zarkhov return to Earth to battle Red Sword fascists.
Did Ming die, or is he imprisoned like a common Firelord?
I know in the serials he died from one of his own death inventions. I believe he was disintegrated. Ditto some of his other media appearances.
But the fact is, he’s a tricky one. He always comes back. Even in the 1980 movie - his last big screen appearance, I believe, he took a spaceship through the chest and was hinted at coming back in the very end.
So your options are endless, literally. Ming is filling the ‘evil intelligent alien warlord’ space and he’ll always have some sort of backup get-out-of-jail-free plan. You can safely tell your players any tale you want wherein he escapes death by the thinnest of margins due to his ability to plan and begin plotting again.
In comic books, he appears sporadically–most recently six years ago–as the main antagonist of Defenders of the Earth, a.k.a. Kings Watch, a super team composed of Flash Gordon, Mandrake and the Phantom. It’s not that Phantom and Mandrake have no recurring villains, it’s just that none of them has Ming’s marquee value.
In the original comic strips, he was overthrown, but not killed. He built a mind-control machine. Flash managed to turn the tables. Under the influence of the mind control, Ming declared a republic, then went off into exile.
I remember one storyline from the 1970s, in which Ming returned to Mongo, and started to build a personality cult among disaffected youth. (A stand-in for the Hitler Youth, or the Chinese Red Guards, depending on your politics.)
So, according to the Alex Raymond strips, Flash Gordon deposes Ming the Merciless in 1941. After escaping from the chambers where he was in a coma due to the effects of an hypno-ray (not making this up), Ming tries to assassinate Flash, but the hero manages to punch his lights out and that’s the last we see of Ming in the Raymond canon.
After Flash comes back to Earth so he can use the advanced Mongo technology to defeat the nazis (again, not making this up) and, unable to enjoy boring earthly life again, he decides to return with Zarkov and Dale to the alien planet. After a couple misadventures, he reaches Mingo City where his friend Barin was supposed to be the ruler, only to find that an until then unheard of son of Ming, Kang, has managed to take over.
Kang wants to kill Flash to “avenge” his father. Which makes me assume that he was executed at some point during Barin’s reign.
Wang the Wignificant, or Wang the Wigless? Ah, you’re channeling Flesh Gordon. Anyway, I see possible involvement with the star ship Intercourse thrusting through the galaxies.