A/N: Another chapter since I missed a day
.
.
.
Marineford, the absolute center of global justice, held its breath.
One hundred thousand elite Marines stood in perfect, disciplined formation in the crescent-shaped plaza. The heavy artillery cannons lining the bay were loaded and aimed. Seated beneath the execution platform, radiating an aura of overwhelming, impenetrable power, were the three Marine Admirals: Aokiji, Akainu, and Kizaru.
At the very top of the towering wooden scaffold, kneeling in heavy Seastone shackles, was Portgas D. Ace.
The air was thick with an unbearable tension. The world was watching through the visual Den Den Mushis, waiting for the Emperor of the Sea to make his move. But before the first cannon could fire, Fleet Admiral Sengoku stepped forward, looking down at the young pirate.
Sengoku raised a horned Den Den Mushi to his lips, his voice booming across the plaza and echoing across the entire world.
"Portgas D. Ace," Sengoku declared, his gaze utterly devoid of pity. "Tell them the name of your father."
Ace kept his head bowed, the shadow of his messy hair hiding his eyes. "My father is Whitebeard."
"Wrong!" Sengoku barked instantly.
"NO, IT'S NOT!" Ace roared back, violently straining against his chains, his voice cracking with desperation. "WHITEBEARD IS MY ONLY FATHER!"
"We searched frantically for years on that island in the South Blue," Sengoku continued, completely ignoring the boy's plea. His voice carried the heavy, unyielding weight of Marine history. "A woman named Portgas D. Rouge traded her own life to hold you in her womb for twenty months, hiding you from our eyes. But the bloodline cannot be erased. Your true father..."
The entire plaza fell deathly silent. Even the Admirals shifted slightly in their seats.
"...is the Pirate King, Gold Roger!"
The revelation struck Marineford like a physical shockwave. Gasps of sheer terror erupted from the Marine ranks. Across the globe, civilians and reporters watching the broadcast screamed in disbelief. The bloodline of the ultimate evil had survived.
"That is why you must die today!" Sengoku announced to the world. "Even if it means all-out war with Whitebeard, your head will roll!"
Before Sengoku could finish his grand declaration, the ocean itself began to groan.
RUMBLE.
The waters inside the crescent bay began to violently bubble and churn. The massive, reinforced steel gates hadn't been breached, but the sea was rising from below.
Suddenly, four colossal, coating-covered pirate ships erupted from the depths of the bay, breaking the surface in an explosive shower of seawater. The coating popped, revealing the formidable allied captains of the New World.
But it was the massive ship that surfaced in the dead center of the formation that made the Marines' blood run cold.
The Moby Dick.
The heavy wooden footsteps echoed across the silent, frozen bay. A colossal figure stepped onto the prow of the flagship. He carried a massive, legendary bisento in one hand. His broad chest was scarred, and his signature white, crescent-shaped mustache completely dominated his face.
Edward Newgate.
Whitebeard.
The Strongest Man in the World.
"GURARARARA!"
"My beloved son is doing alright, isn't he?" Whitebeard grinned fiercely, slamming the butt of his bisento into the wooden deck. The sheer, physical impact of the weapon cracked the air itself, sending a terrifying tremor vibrating through the Marine fortress.
"It's been a while, Sengoku!"
"Whitebeard..." Sengoku gritted his teeth, sweat beading on his forehead as he looked at the monster who held the power to destroy the world.
But Sengoku's strategic mind, honed over decades of warfare, suddenly hit a terrifying, screeching halt.
'It couldn't be...!!!'
Whitebeard didn't stand alone on the prow.
Slowly, deliberately, a second figure stepped out from the shadows of the Moby Dick's massive mast, taking his place shoulder-to-shoulder with the Emperor of the Sea.
He wasn't a giant. He didn't carry a massive polearm. He was an older man with long, silver hair, round glasses, and a long cloak draped over his shoulders. He casually drew a simple, straight sword from his hip, resting it lightly against his shoulder.
A profound, suffocating silence fell over the execution platform. Marine Hero Monkey D. Garp, who had been sitting cross-legged next to Ace, widened his eyes in absolute, unadulterated shock. Sengoku's face drained of all color.
Down below, Admiral Kizaru slowly pushed his yellow-tinted glasses up the bridge of his nose, his usual lazy drawl completely vanishing for a fraction of a second.
"Oooooh... now this... is a terrifying surprise."
"Silvers... Rayleigh."
The Dark King.
The right hand of the Pirate King.
'All these old bastards...!'
Sengoku gripped the railing of the platform, his knuckles turning white. The rival of Gol D. Roger and the partner of Gol D. Roger, standing together on the same ship. It was an apocalyptic nightmare the Marines had never even considered possible.
'Why?'
Sengoku thought frantically.
'Why is he here?!'
'Damn it!'
.
.
.
A/N: I had always wondered why I had never seen a single fanfic where Rayleigh was made aware that Ace was Roger's son beforehand. What would he have done? In the original One Piece, Rayleigh likely did not know, there's no proof. But here, he does.