As always, both comic book logic and crazy sex fantasy rules are in effect.
I discarded a lot of ideas before finally deciding to just use the Royal Flush Gang from Batman Beyond. The other versions are more JLA villains and I want to keep this story focused on Gotham - plus, writing this group just felt right, while I didn't have ideas for the others.
*****
"Fuck me, Supes, fuck me!"
Despite her repeated cries, Harley was doing a perfectly good job of fucking herself. Superman lay back on the bed and watched as the former Clown Princess of Crime bounced up and down on his cock. He could have taken an active hand, but then she'd have worn herself out even faster. Besides, she looked pretty good with her hips rolling against his, her breasts bouncing with each movement.
For once, his thoughts didn't wander to justice or plans for Gotham. He just enjoyed the feeling of Harley's pussy sliding around him. Though after a while he did find himself imagining her doing the same with some of the others present. Nothing was happening that day, perhaps he should bring them to-
"Superman, we have a problem."
Of course, the one time he relaxed completely would be the time things went wrong. Barbara was simply speaking in a low voice, but his super hearing easily picked up her words. He listened carefully, though he didn't tell Harley to stop moving.
"A scan just swept our side of Gotham. This is incredibly advanced technology, but it doesn't seem alien - I don't have an explanation for it. But it might have been able to detect the Batcave, and if... shit, we have someone incoming. No, five fliers incoming! We-"
Whatever else she had been about to say was drowned out by a crash and the shriek of tearing steel. Superman pulled out of Harley and was on his feet in an instant, looking through the walls with x-ray vision. Barbara had been knocked out of her wheelchair but wasn't harmed. As soon as he confirmed she was safe he instead looked for the attackers.
Though they were already splitting up, he had time to get a good look at them. Based on their costumes and the enormous playing cards they flew on, they must be the Royal Flush Gang, yet they didn't look anything like the ones he had fought before. Two men, two women, and one massive faceless creature, all spreading out through the Batcave with murder in their eyes...
"Aww, didja have to stop?" Harley had dropped onto the bed, one hand trying to fill the suddenly empty void between her legs.
"We're under attack, Harley."
"I know that, Supes, I still have ears! But could ya let me hop on your cock before you fly around and smash them all?"
It was an idea worth considering, but Superman had switched completely to action mode. Before he could consider switching back, one of the Royal Flush Gang burst into the room. The Queen wore a mostly white outfit with red and gold highlights. It hugged her body impressively, but he was more focused on the scepter in her hands.
At that moment a kaleidoscope of color burst from the tip. Superman actually took a step back, almost dizzy. A moment later he focused his mind and shook off the effect, but it had been a powerful one. He didn't know of any modern technology that could do that, even among the aliens he'd fought...
"Your mind isn't as strong as the rest of you, is it?" The Queen smirked, but her gaze was sliding downward to his cock, which was still exposed and rock hard. "This hypnotic scepter will... render you... God, that thing is huge. I, uh... what was I..."
Harley struck the Queen from behind with a hammer she had definitely not been carrying when she'd entered the room. The Queen went straight down, losing her grip on the scepter. Harley caught it with her free hand and turned the burst of color directly into her face.
"Ooh, pretty..."
She seemed thoroughly distracted by the flashing lights, so Superman bent down beside their opponent and lifted her by the back of her costume. He held her at arm's length in one hand, looking her over. The blow had knocked several strands of blond hair loose from her costume and she had an impressive hourglass figure. But attractive as she was, he didn't have time for that, he needed to find out how the Royal Flush Gang had this technology. And more importantly, the others...
"Score!" Harley leapt onto him from behind, arms around his neck. She moved at human speeds whenever he was looking at her, but somehow she almost seemed to hop around when he wasn't paying attention. "You got another girl to fuck, huh Supes?"
"Not now, this is a serious attack!"
"Is it?"
She asked the question in the same playful tone as always, but Superman realized that she actually had a point. He looked past the Queen and through the walls of the Batcave, searching for the others.
X X X
Though a burst of plasma tore into the Batcave, before she'd fallen, Barbara had spotted something worse. She grabbed the edge of the computer console and pulled herself back up. Yes, there was some kind of advanced technology attempting to wirelessly hack the computer.
It was impressive tech, but it couldn't break basic laws of physics. There were failsafes for an attack just like this, and Barbara quickly activated those she thought would be most effective. The attacker tried again, but Barbara moved to counter, shutting down yet more outside access. That left them temporarily blind, but there was no way the computer could be hacked from afar.
"Not bad." A woman entered the computer room, lowering a hand-held device. She was obviously a Ten from the Royal Flush Gang, but Barbara had never seen that outfit: half white and half black with glowing red eyes. "I'm surprised there was someone that fast on security, considering how out of date your tech seems."
Out of date? That suggested their attackers were from the future, which wasn't outside the realm of possibility. But more importantly, Ten was walking toward her with another device: one that looked like it would plug directly into the central computer. With physical access, it was only a matter for time before the hyper-advanced tech would get inside.
"I think you can guess what this will do. Stay down on the floor and you won't get hurt."
Barbara lowered herself to the ground, since her arms were beginning to feel the strain, but watched Ten carefully. As soon as the other woman's attention moved to the computer, Barbara threw herself at her opponent's waist.
She managed to knock her to the side, but her opponent had clearly been trained. Ten caught her second blow and then slung her off. From there she kicked at her hips, and Barbara could only flinch away. But Ten's next blow tried to strike her head, and that was a mistake.
Barbara caught the other woman's foot and pulled her off balance. Though Ten tried to recover, Barbara was much faster. She threw herself up enough to get a fist directly into Ten's stomach, then as her opponent doubled over, brought her elbow up against her chin.