Okay, but you know what's even funnier?
Danny doing it as HIS USUAL NORMAL SELF.
Like @merchantziro 's addition. But add Danny sitting there with a Starbucks, wondering for several minutes weather or not he should engage that battle.
Then the Batsuit break, and Batman is pulled out, and -
(he can't watch another parent die. He can't. He WON'T.)
"Hi, Ugly! Put him down!"
The heroes watch in horror as the Normal Kid TM stands on the ground by a destroyed restaurant, and shouting at the world-ending god.
(Also, where the hell did he get that megaphone from?)
Nightwing, the closest, rush to get him to safety before his idiot brother could get himself killed.
(Not another brother. Not again.)
"yo, did you here me? Put him down and come face me like a MAN, you coward!"
Red Hood can only watch in awe and horror as the newest Wayne show his luck of survival instincts.
The rising god drops Batman midair, and float to face the child.
"I am not a man, little pest. I am a GOD."
Wonder Woman, hardly catches Batman before his falling speed could become deadly. He is unconscious now, and part of her think it's for the best. He shouldn't watch his son's death.
"well, I'm not a man either. I'm a teen. Glad we got this understandings." Danny smiles.
The ruler of Apocalipse, the New God, the most powerful being in the universe, look at this child.
Or what hides, and pretends to be a human child. The thing is smiling, a smile too wide for the face it's wearing. There are too many teeth in that mouth, going back into the unending darkness -
Darkeseid stares into the abyss.
"Now," says the... thing. That creature. The unnamed abomination. "Why don't you go back home, and live peacefully for the rest of your life?"
The Thing's eyes are cold. It stares hold inside him, reaching to his core, like a blade made out of frozen smoke.
"No need to fight, right?" Says the teeth and eyes and smoke and frozen screaming of the doomed.
"No, sir. I'll leave."
Flash still isn't sure what. Not even what is that "what".
Darkeseid just turn his tail and ran, after a minute of conversation with the new Wayne. The Normal Kid.
(nope. Still doesn't make any sense in his mind.)
"What... how did you do that?" He asks.
The kid just take a sip from his drink. "Did what?"
"How did you make him leave? What did you tell him?"
"Damn, I think it's finished ". The kid mumbles to himself, disappointed. "Um, what did you ask?"
It's okay. Barry used to ADHD kids. "How did you make Darkeseid leave?"
"Oh, so that's his name? Yeah. Just told him to leave." The kid shrugs.
"You," Barry's pretty sure he misheard him. "You 'just told him to leave'?"
He's going crazy. He's loosing it. He fell into a different dimension. He lost it and this is his death dream moments before the world is gone.
"Yeah, man," the kid still look unbothered. "I hate bullies. That's sooo not cool of him to do this shit out of the arena. Someone could have been hurt, you know?"
"The arena..?" Is he having a stroke?
"Yeah, in the comic con you're all going to." The kid shrugs. "Cool Cosplay, by the way."
*He won't stop running until he reaches his home planet, where he'll continue to establish a peaceful kingdom that would last three generations. But that's another story.