Alright, I'm gonna do... Orion.
O'Ryan Masters is a high-ranking engineer who's working at Cadmus, who starts getting "dark" thoughts. His productivity falls, he can't concentrate, he starts getting into more and more hardcore porn, he neglects his work, all that. Also, he thinks somebody, or something, is watching him. He can't sleep, and when he does, he has nightmares about something called "Darkseid".
One day, he snaps. He raids his lab, and takes all the stolen equipment to his place in the mountains. And then... he blacks out. When he wakes up, he finds himself naked, in a room full of scribbles. Some of it is in some unknown language, some notes are in English, and some sort of "formulas" are in Ancient Greek. He looks around, terrified, only to see a shadowy shape. He stares at it. It stares at him. And then... it lunges.
The world spins. He's now alternating between an extremely bright series of colors, a dark and depressing place and the room. He hears whispers, and sees more shapes. He screams. Eventually... it stops.
He's back at the room. Only he has an Omega Symbol at his back. He slowly rises. He looks catatonic, and his body is full of snapped bones, and looks like a puddle. Suddenly, his muscles start rejunovating, and his bones snap into place. In the end, he rises, looking like a demigod. His eyes are glowing. He's now 2,10 meters tall. His cock is 10" flaccid. A few words come out of his mouth. Not something we'd understand.
He walks towards a closed case. Noises are heard. A buzzing noise, coupled with banging. The case opens. The noise gets louder. He enters inside, as CADMUS breaks in. They look at the mess, and notice the case, which has started to slowly crack open. In the end, it explodes, killing everyone.
O'Ryan, now Orion, in full get-up, steps forward. Before him stand Highfather & Darkseid, albeit distorted. They stare at each other, before he steps out.
So, uh, that's it. It's basically Ult!Thor but edgier.