DC: Becoming Doomsday in Marvel Universe

Let's make this clear up front, Rook Tanner really wasn't trying to act like a pervert.

Fury and his team wanted to see his abilities. What was he supposed to do? Punch the planet into pieces? Or actually put on a show demonstrating his powers like some kind of street performer?

After thinking it over, Rook decided that since Tony and those three soldiers had already seen him in his Doomsday form, he might as well transform again. He wasn't about to waste more time than necessary.

But what about his clothes? Going from six foot three to over sixteen feet tall meant goodbye to whatever he was wearing. And he still needed to head back to Stark Tower afterward to take care of business.

So he stripped down. All of it. Gone.

Natasha instinctively turned away. Even for an elite agent like her, it was impossible not to feel a little embarrassed or awkward.

Rook loosened his neck a bit, glanced at Fury and the others, and then his body began to change.

In an instant, he grew rapidly. His height shot up past sixteen feet. His frame bulked out horizontally as well, muscles that were already powerful becoming monstrous. He looked like a living mass of muscle.

A terrifying layer of bone armor spread across his body, lined with sharp, jagged edges that could slice through Superman's invulnerable skin.

Even a multiverse-level god like Darkseid would be forced to steer clear of those deadly spikes.

In the blink of an eye, Rook had transformed from a human into something monstrous. No, this was his true form: Doomsday.

And this wasn't just any Doomsday. Rook was the very first Doomsday born on Krypton ten thousand years ago. His strength was unmatched. He could annihilate an army of one hundred thousand lesser Doomsdays by himself.

The Doomsdays that came after him were created from experiments based on his success, but none matched him. The others stood no taller than ten feet at most. Their power couldn't compare. Even all of them combined couldn't take Rook down.

Through countless battles, Rook had evolved again and again. He had overcome the weakness to kryptonite. Even Darkseid's Omega Beams could no longer harm him. After being beaten to death countless times by those one hundred thousand Doomsdays, he had developed immunity to punches, kicks, and physical blows. After dying from them once, his body adapted so it could never happen again.

Heat vision, energy blasts, all of it was useless against him now.

Just standing there, Rook filled Fury and his team with such terror that they couldn't even speak.

Natasha forgot everything else. She stood up instinctively, staring up at Rook with wide eyes. His head was pressed up against the ceiling. He had to tilt it just to avoid smashing through into the floor above.

"How should I demonstrate my power now? Tear this building down? Or level New York City?" Rook asked. His voice, now deep and monstrous, echoed through the room.

Fury immediately raised his hand to stop him. "That's enough. That's enough."

Truth be told, Fury was shaken. He considered himself someone who had seen it all. He'd even dealt with aliens before. Few people knew Earth had already been visited by species like the Skrulls and the Kree.

So when he learned Rook was an alien, he hadn't been too concerned. But now he realized how wrong he had been.

The sense of threat and helplessness Rook gave him was greater than anything he had ever faced. Not even when Ronan the Accuser's fleet approached Earth had he felt so powerless or afraid.

He had no doubt that this creature could do exactly what it said.

Destroy New York? Fury couldn't even begin to imagine bearing that responsibility.

"That's enough. Please, change back," Fury said.

Rook shrugged. He hated to admit it, but this was his true form. He was Doomsday now.

In a flash, he changed back into his human form.

Unlike most beings, Rook could transform at will, without losing control or going berserk. He grabbed his clothes and got dressed quickly, but when it came to the tie, he hesitated and looked at Natasha.

She glared at him.

Rook spread his hands. "I don't know how to tie a tie."

"So you want me to tie it for you?" Natasha practically shouted, unable to believe what she was hearing.

Fury nodded slightly at Coulson. As Coulson stepped forward, Rook sighed, clearly reluctant, and swiftly tied it himself.

Natasha clenched her teeth in frustration. No wonder he and Tony got along so well. What a jerk.

Hawkeye, meanwhile, stood silently, deep in thought. His bond with Natasha was unique. Even when Loki controlled his mind with the scepter, she had believed in him without question. But they weren't lovers. Hawkeye already had a family. His eldest daughter should have been born by now.

Natasha was one of the few who knew about his family and was like family herself. So Hawkeye wasn't jealous or hostile toward Rook. If anything, he was thinking hard about something else.

Rook barely noticed Hawkeye. He turned to Fury. "I've cooperated with you this much. Can I leave now?"

He had shown enough. All he wanted was for S.H.I.E.L.D. to stop bothering him. He didn't want them coming back over and over again.

Fury, shrewd as ever, caught his meaning. Smiling faintly, he said, "You really think that just because you won't join us, you can shake us off completely?"

Rook turned back, his expression serious. "I'll kill you, you know. I mean it. It wouldn't even take effort."

Fury flinched and quickly tried to ease the tension. "Don't misunderstand. I'm not trying to make trouble. I just hope that when we're in trouble, we can ask for your help. Oh, and I've been working on a team of heroes. Would you..."

"No interest," Rook interrupted flatly. He knew what Fury was hinting at. The Avengers. But he had no interest. At least not right now.

"I've shown more than enough sincerity and patience. I hope you understand and don't push your luck." Rook stood at the door, back to them, his words not quite a threat but something that felt even stronger. Then he opened the door and walked out.

He'd done enough. He'd cooperated enough. It was his way of telling them to stop interfering.

If they kept pushing, next time he wouldn't be so polite.

Inside, Fury and the others exchanged looks, realizing only then that cold sweat had broken out on all their faces.

It had started out so smoothly. But the moment Rook turned serious, it had been terrifying.

"Boss," Natasha said, looking at Fury. "That's an uncontrollable monster. Take my advice. Leave him alone."

"Unless," Fury said, looking at Natasha, finishing his thought with a cryptic smile, "someone can tame him."

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