No we don't know it's Lex. Lobdell said it was during a time before they had even decided to reboot the character altogether.
So unless his human donor was the most narcisstic sociopath the world has ever seen.....
Or something to that effect. Lex being the other daddy has been the most popular retcon to the character since Superboy was reimagined as a clone, its not gonna be discarded.
As for the 3rd donor, for some reason I wanna guess Daemonite.
I remember reading something about it a little bit before The Culling event. I'll try to dig it up. Also I recall one of the issues where it makes a jab at what the human donor's personality was like and it pretty much described Luthor to a T. I'll read trough my books again and get the scan.
Superman,lex,and a female from the future is my guess,course i dont know any females besides saturn girl who has a high enough profileto be alongside such iconic dna like kals and lexs.
Im still hoping for ms.martian,even if that chance is very slim.
And you know, given the way Lobdell plots, he probably didn't even know who the donors were at the time.
What if its Lois Lane?The human donor?That would be Super akward too.They arent together but considering SB is from the future,it might give the impression that there is a chance SM and LL will be the end game.
I'm pretty confident that it's going to be Lex Luthor, just because that makes the character more inconic and eaisly understandable.
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Yo holmes this is the most obvious lex as donor shoutout.
I think you are taking lobdells whimsical way of giving a interview,and how he writes to literal,im sure he thought things out,and knows whonall three donors are.
Luthor or not, we know a third of hid DNA is human, a third is kryptonian, it's that last third that I find interesting. I wouldn't mind waiting 5 years to find out who the human donor is, but I really want to know where that last third comes from.