-Themyscira-
Aresia, the adopted sister of Diana, aka Wonder Woman, as her family had been killed in a war and she was raised as an Amazon. However, she was under the strong belief that in order for women to be free, every man on the planet must 'removed'. To do this, she spent an extended amount of time alone, isolated in a tower as she did extensive research on biology, chemistry, and germ warfare. Aresia then traveled to Metropolis and recruited some criminals by promising them money, power, and total dominion over the world. As the criminals did her bidding with no problem, Aresia got what she needed to unleash her grand plan and used the same criminals she recruited as her first test subjects. They quickly succumbed to the new virus and died horrible deaths. Aresia, satisfied with the results, smiles to herself.
Over the years, the virus grows larger and more powerful, spreading across the globe like wildfire. This virus was so powerful, even male members of the Justice League fell victim to it, such as Superman, Batman, the Flash, Martian Manhunter, and Green Lantern. Worst of all, even male teenagers and children weren't spared from the virus, and unborn babies perished in the wombs of their mothers.
Diana, Hawkgirl, and Queen Hippolyta tried their best to stop Aresia, even going as far as telling Aresia that her life was saved her and brought her to Themyscira, even if it killed him. Despite this news, Aresia was unrepentant and continues with her evil plan.
The world continues to spiral out of control and fall into chaos as more and more men succumb to Aresia's virus every day, in what could be described as 'gender genocide', and Aresia was doing this under the Amazon teachings of old.
However, after an undetermined amount of time, the female members of the Justice League managed to pick the world back up, despite how bad things have gotten recently, with some help from some female world leaders, but they knew mankind would eventually go extinct from the virus.
-Five Years Later-
Watchtower
Wonder Woman, who is now the leader of the Justice League, gazes down at Earth from a window, feeling immense sorrow for the state of the planet, even though things on Earth are stable for now, despite men being gone, but since most of the villains were male, crime was virtually nonexistent. Diana also feels responsible for what happened, as she didn't stop Aresia when she had the chance.
As Diana continues to stare down at Earth, Hawkgirl speaks up and asks, "What's wrong, Diana?"
"I think you already know what's wrong." The demi-goddess responds softly with a tone of bitterness.
Hawkgirl gives her a sympathetic look and says, "Diana, we did all we could."
"I know that, but we still failed!" And now humanity is doomed to extinction." Diana angrily replies. "If only I aimed for her head..." She adds quietly.
"It's not like Aresia had a stamp on her forehead that said she was gonna kill every male on the planet, Di." Karen Starr, aka Power Girl softly said. "You couldn't have known."
Despite their words of comfort, Diana still felt guilty, but unbeknownst to any of them, their prayers were about to be answered...
-Marvel Universe: Earth 616-
New York
Iron Man, Captain America, Hulk, Black Widow, Hawkeye, Thor, Scarlett Witch, Quicksilver, Black Panther, Vision, Ms. Marvel, Wasp, and Ant-Man are battling the Squadron Supreme, which is comprised of Hyperion, Nighthawk, Doctor Spectrum, Power Princess, Nuke, and Speed Demon. The villains are trying to steal something from Oscorp Labs, and the Avengers were called in to stop them, but the Squadron Supreme will not stop until they get what they came for.
Hulk, Thor, and Ms. Marvel trade blows with Hyperion, Nuke, and Power Princess while Quicksilver fights Speed Demon. Hyperion knocks Thor and Ms. Marvel away, leaving Hulk to fight him on his own. The two powerhouses collide as Quicksilver takes on Speed Demon.
"Come back here!" Quicksilver shouts as he chases Speed Demon across the facility, trading blows with him whenever he's able to reach his speedy foe. Suddenly, Speed Demon was stopped in his tracks and he looks down, finding his feet wrapped up in red energy; courtesy of Scarlett Witch. Before Speed Demon could respond, he's knocked out by Quicksilver.
As the heroes and villains continue to clash, Hulk is punched into the machine that the villains were attempting to steal, which opens a wormhole to another dimension. Once Hulk is sucked into said wormhole, it then closes before exploding, much to the horror of the Avengers. Angered by the supposed death of their fellow Avenger, the rest of the heroes fight on with more brutality. They eventually defeat the villains, but it doesn't help the pain of apparently losing Hulk. Thor, Iron Man, Wasp, and Black Widow take his 'passing' the hardest, especially Black Widow, who had feelings for him, albeit hidden feelings.
-DC Universe-
Earth 1
Metropolis
Bruce wakes up, groaning in an alley. He slowly sits against the alley's wall until he's able to stand up and walks out of the alley, discovering he was still in New York, but a much more futuristic version of it. Bruce is really confused, especially upon realizing that he only sees women walking around; there isn't a man in sight.
"What the hell is going on? Why are there no men?" Bruce asks himself. He hears a feminine voice call out to him, so he turns around, his eyes setting on a pretty woman with honey blonde hair that she kept loose. She was wearing a brown tunic, a skirt that reached her knees, and a pair of glasses covering her face.
"H-How are you still alive?" The woman asks with immense surprise.
"What? What do you mean no that?" Bruce asks, confused by her question. The woman clears her throat before telling him about Aresia and how she released the lethal virus five years prior that killed every man and unborn male child on Earth, and was still in the air, much to Bruce's horror.
"How are you immune to the virus?" The woman asks.
Figuring it was because of the Hulk that was making him immune, he decided to keep his monstrous alter ego a secret for now. "Well...it's kind of complicated. By the way, I'm Bruce. Bruce Banner."
The woman nods slightly before thinking that if Bruce was immune to the virus, he could help solve Earth's problem. "Come with me to S.T.A.R. Labs. The scientists there can run some blood tests on you. If you're immune, it's possible we could make your immunity into a vaccine for future generations or whatever."
Bruce thinks it over for a bit, sighing before nodding his head. "Okay. Sure."
The woman smiles as she leads Bruce to the aforementioned building. "Oh, I'm Felicity. Felicity Smoak."
-Later-
As Bruce and Felicity walk down the sidewalk, several women notice Bruce, shocked to see a man walking around and showing no signs of infection while other women, happy to see a man after so long, look at him with intense desire. Bruce lacking a shirt didn't exactly help either. Bruce notices the women gazing at him, which was making him nervous. "Felicity...these women are looking at me like they're about to devour me...sexually."
Felicity's eyes widen as she looks around at the women. Thinking quickly, she grabs Bruce by the wrist and runs towards the S.T.A.R. Labs building, entering said building and locking the door behind them, separating them from the lustful females outside.
Bruce and Felicity sigh in relief before several female scientists see Bruce and gasp, shocked to see a man walking around, unaffected by the virus. "Is he...r-real?" One of the scientists asks Felicity.
"Oh, he's real. He's 100% real." Felicity says with a chuckle. "You gals can ogle him later. Come on, Bruce. Let's get some blood drawn." Bruce nods as the two head off to a separate room, the other scientists looking at Bruce with desire, but they were able to keep calm, as opposed to the women that were practically onto Bruce like a dog on a steak.
-Later-
Felicity injects a syringe into Bruce's arm, drawing some blood into it before pulling it out and marking it 'Bruce' before bandaging his arm. One of the lady scientists enters, getting a glimpse of Bruce's shirtless body before handing him a shirt.
"Thank you." Bruce says to the scientist, who smiles cutely as he puts it on.
"You're welcome." She says, still smiling before walking off.
"Well, I'm hungry. How about you?" Felicity says with a sigh.
"Starving." Bruce chuckles. Felicity chuckles back as she leads him to the cafeteria.
-Cafeteria-
Bruce sits at one of the tables, a tray covered in scrumptious food, including ham, macaroni and some apple slices. Felicity smiles as she sits across from him at the table.
"Bruce...is it okay if I ask a few questions?" She asks, to which Bruce nods as he eats. "Okay. Um...where are you from?"
Bruce sighs. "I'm...I'm from a different universe." He says, remembering the machine that sent him to this world. "Much like this place, only...no man-killing virus, and New York doesn't look like this."
Felicity chuckles. "Okay. Next question. Do you have any superpowers?"
Bruce gulps down some milk before nodding. "Uh-huh."
"Wanna show us? We got nothing to do." One of the scientists asks as she walks up to him.
Bruce sighs as he stands up and takes off his new shirt, making Felicity and the other women blush wildly at his muscular figure. He sighs once again as he transforms into Hulk, catching the women by surprise as they gaze at the green-skinned giant in shock and awe.
After adjusting to seeing Hulk, Felicity clears her throat. "So...big guy. Hehe. How does it feel to have every woman you meet gawk at you?"
"Mmm...I'm uncomfortable with it...but I'll tolerate it. You all lost people." Hulk says, sharing memories of Bruce being told about the man-killing virus.
Another female scientist walks over, jumping slightly as she spots Hulk. "Um...we have a problem, Felicity."
"What is it?" Felicity asks.
"T-There's a mob of women outside. If I had to hazard a guess, they're after tall, green and very handsome." She says as she looks up at Hulk.
Hulk sighs, nervous about the situation. He wasn't scared of the women...but he was afraid that he'd hurt them if he tries to defend himself if they get inside the building, and Hulk didn't want that to happen.
Seeing as how Hulk wasn't exactly secure in the lab, Felicity makes a call.
-Watchtower-
On a mostly quiet Watchtower, a phone rings. Hawkgirl, a fellow Justice Leaguer, sighs as she answers it. "Yes?"
"Hawkgirl! Hi. It's Felicity." Felicity says hyperactively, clearly panicking as the mob of women starts to get really violent.
"Oh, hi. What is it, Felicity?" Hawkgirl asks.
"Um...we got a bit of a situation..." Felicity says nervously.