So I was reading the second half of Superman: Doomed since I took a small break from comics when it was happening. When I came across this:

To put more to the theory, he is was called "superman's first enemy" , just like joker is the first "super villain" Batman ever fought. and he seemed to be laughing a lot.

Superman's Joker was revealed in the solicits of B/S #20!

Way to go DC :P By the way many viners actually guessed the correct answer.

Yeah some Viners have already guessed the right answer thanks to DC's spoiler filled solicits for March. It would undercut any pretence of originality that Pak had in the first place.

@lvenger said:

Well, not completely. Kandorians might be just goons, but there could be also guy who put them into action/leader of terrorist cell/ or mind-controls them. In such case he will be true “Superman’s Joker”. Might be Phantom King, anyone else or no one at all.

Eh even so that would be kinda predictable given how he escaped the Phantom Zone at the end of Doomed. Plus Morrison never wrote him in a Joker like way. More of a Mad Scientist from Krypton.

@lvenger:

Well, his madness might have got worse with years.

I’m not insisting that our culprit is Phantom King exactly. Might be anyone else.

Even Hammond is a bit suspicious to me. He scanned Earth and found several millions of people who could be potential psychopaths – and only one with actual ability to make it happen – Lobo. Why he didn’t found Kandorians flying around? Don’t think that their size could hide their minds from telepath.

@squalleon: @lvenger: @sanohibiki: God damn those solicits...I really wanna check it out now >__<

Is it worth spoiling myself?

If you mean a true arch nemesis then he already has one, his name is Lex Luthor.

@joshmightbe: No, I meant this new story arc in Batman/Superman

http://www.comicvine.com/articles/who-is-superman-s-joker-we-ask-greg-pak-for-clues/1100-150731/

Pre 52 had the best inversion of Superman ever with Hank Henshaw as Cyborg Superman.

Then, they scrapped on their best storylines.

At least they are trying to repair the damage to Batman from 88-89

yep,i thought of that too,probably someone is manipulating them in the shadows.

@2cool4fun: Batman First Enemy is not The Joker. In fact Batman have many villains before The Joker created in 1940.

@boynerdgeek: I know, but as I already said the joker is his first "super villain"

While it's probably already confirmed, I wouldn't mind Xa-Du (think that's PK's name) being a more psychotic villain. Personally, I wished Superman's Joker was a JLD-esque supernatural entity.

@2cool4fun: I personally don't think it is myself due to a way Pak uses Superman's suicide scenes in history but others would say it is.