Not explicit but death in here.
A secret US government building and dressed in his suit was up and coming member of the US military Lieutenant John Walker being escorted by personnel in the US military. Leading them was none other than Colonel Joe Ledger who was known as the superhero Doctor Spectrum and member of the newly formed Squadron Supreme. "Colonel Ledger sir... I just want to state that just being in your presence is such an honour sir... The fact that you are one of the planet's greatest superheroes and that group you are now part... the Squadron Supreme... To be amongst the most powerful protectors... I can only imagine being part of such a team..." Walker told Ledger who smirked as he turned to face him while walking.
"No big deal Lieutenant though I think that I do my best work out in space; taking care of threats to Earth pre-emptively. Though funny you should bring up being part of a team because you are being asked to lead a different sort of team..." Ledger told him as he brought him to an office and Ledger had the personnel then leave as he and Walker then entered.
There at the desk was none other than General Thaddeus Ross the US Chairman of the Join Chiefs of Staff; "Lieutenant Walker... You already have a promising record in your time in the service... Already with a congressional medal of honour and you are younger than I was when I got awarded mine." Ross then greeted him grinning.
"I am doing this for God and country sir; Colonel Ledger said that you want me to lead a team like the Squadron..." Walker replied and Ross nodded.
"Ah yes; the Squadron... The country's most valuable asset and most powerful protectors all united including the new Sentinel of Liberty himself Hyperion... The country hasn't been safer ever since he appeared 2 years ago but unfortunate there are such matters where the Squadron are limited... Mr Tony Stark has been talking with politicians to lobby about allowing superheroes to serve in the US military; the draft that was put in place to create the Golden Agency during WWII isn't enough... So there are matters that the Squadron are legally unable to do so a different team is in order..." Ross then replied.
"What kind of team sir." Walker asked as Ross straightened up as his put his hands together.
"Back during my days as an active soldier in 'Nam; I was made the field leader of an off the books unit where convicted felons were given the chance to repay their debt to society and reduce their sentence by enlisting for some 'dirty' operations. It was leading this group of miscreants where I earned the nickname 'Thunderbolt' and this group unofficially became known as the Thunderbolts." Ross then explained and looked closer to Walker. "I managed to get the permission from the necessary people to reactivate the initiative but instead of using normal criminals... We will be using the super ones... Supervillains as media likes to call them." Ross then explained as Walker's eyes widened.
"Sir; are you sure that's wise... What if things went wrong..." Walker then asked as Ross looked dismissive.
"Then they will be the scapegoats; complete deniability for the US government.. We will give the reports that they had escaped if caught... It's a risky business but I want you to be the new field leader of this new project..." Ross then asked and then smirked as Walker ended up nodding.
In a debriefing room Ross was there with Walker as several people where seated; "Welcome to the first day of the rest of your lives Thunderbolts; let's introduce you all to your siblings for this operation. Just remember that if you fail to follow orders or goes rogue then the nanites we injected in you will have your heads explode." Ross then told him.
"Natasha Romanoff the Black Widow; the top assassin that ever came out of the Soviets' secret Red Room training academy. An infamous killer almost unlike any other." Ross then said as a redheaded woman in a black bodysuit smirked at his direction.
"Why thank you capitalist dog; do you want to be my new father after Mother Russia abandoned me?" Natasha asked mockingly as Walker glared at her.
"Proxima Midnight; a member of a group of alien invaders that called herself the Butcher Squadron. The only surviving member after Hyperion and Doctor Spectrum took care of them." Ross then said as there was a muscular blue haired woman in a black bodysuit with a golden armor piece over her left arm, a spear, black paint on her face and a black horned helmet.
"I serve the great Thanos the Balancer of the Universe and the Butcher Squadron was just a tiny taste of his forces. I just have to bide my time before he comes here and then no matter how much you ran... Destiny awaits... His is to half the universe and win the love of Death herself..." Proxima interrupted.
There was scoffing from a pink haired boy in his late teens with glasses and black clothes as well as a high tech collar. "This is what you Flatscans decided to put me on a team with?" asked the boy rudely with his arms folded.
"Quentin Quire who chooses to call himself Kid Omega; a Mutant and one of the few active and definitely the most well known after that stunt he pulled at the UN a month ago which got him arrested. The power of telepathy and telekinesis and the collar on him should help restrain his abilities to be manageable until we decide otherwise." Ross then said glaring at Quire who was smirking.
"That's just the first step; I am helping to get the message out to the Mutants out there... One day we will rebuild the X-Men and then avenge all those lost at the Mutant Massacre! I am a visionary and if I die in this stupid team then I shall be a martyr!" Quire then said boastfully.
"Oh yes... I saw that and I am a huge fan of how you had the President of Iran admit that he likes to beats his children." Natasha brought up smirking causing Quire to grin.
"We have 2 more special operatives for this mission... First off... This living legend was found in the artic ocean frozen alive for so long..." Ross said and then brought in cuffed was a large bulky figure of a grey skinned man with patched up scars and wearing old trousers and an animal fur vest. "Meet THE Frankenstein's monster... Mary Shelley didn't write a novel but a biography about real life events..." Ross then said as they took that in.
"This freak show of a team can't get any weirder..." Quire muttered as then entered was a white furred monkey wearing a business suit without pants and sunglasses. "I wasn't trying you to prove me wrong..." Quire muttered as they stared at him.
"This is the Hit Monkey; the assassin who goes after other assassins... Possibly the greatest marksman in the world... We don't know his origin but he has agreed to join us in exchange for a list of locations for various targets that he is after." Ross explained as they took this in looking weirded out.
Then the lights went out and a project showed a picture of a man with greying lines in his hair and a goatee; he had a cane and wearing a fancy suit. "Count Luchino Nefaria; an Italian aristocrat who is well connected and wealthy beyond your wildest dreams. He is a high profile leader in the Maggia crime community and his family were actually one of the founding families of the Maggia. Untouchable legally or risk an international incident. However we have gotten evidence that he has paid a fortune to the rogue government scientist Dr Emil Burbank better known as the Master Menace. For equipment and samples of the DNA of none other than Hyperion. Plans to give himself Hyperion's powers which won't bode well. Your mission is to infiltrate his mansion and destroy his lab before he is able to complete the procedure." Ross then explained to them.
"Time to make up for all the wrongs that you have caused and save the world..." Walker then told them all.
At night Walker led them to Nefaria's mansion in New York city and Natasha helped hack into the server to shut off the security; she then helped find the passage way to sneak their way through while she was placing explosives around the structure.
They went in and managed to find the lab where there was high tech equipment and in a chamber there was Nefaria screaming as he was being imbedded with the blood of Hyperion as well as the generated cells being used to fuel his body. Walker then led them attack with him, Natasha and Hit Monkey with his twin guns firing at all of the scientists. Frankenstein began wrecking the equipment along with Proxima and Quire was using his telekinesis to move things about.
Natasha then began focusing on placing more explosives around the lair; however there was a blast as the equipment exploded and Nefara then flew out of the chamber. He had been transformed and was larger and more muscular as he then tackled Frankenstein and easily overpowered him; he then tore him in half and used his new Atomic Vision to blast Proxima as she had gotten close to him to attack.
"My father used to tell me that money and connections were true power... That they would make you untouchable but he was wrong... Beings like Hyperion with true physical power who if he chose to; could decimate the world and no money would be able to save them... I now have true power... I shall kill Hyperion and take over the world..." Nefaria boasted grinning as Quire noticed that his collar in the explosion as he leaped from it was damaged.
He grinned as he used his abilities on Nefaria making him scream as he was taking control of his mind; "Yes... With him as my enforcer... The new age of Mutants shall began with me as the architect..." Quire boasted triumphantly as the nanites in his head caused it to explode. Nefaria felt weak from the brief time with his mind being taken over.
"Hit-Monkey, Widow... Get to cover... Widow activate the bombs..." Walker ordered as they braced themselves as the bombs went off...
Daily Bugle Communications reported on the explosion toppling Nefaria's mansion leaving nothing but rubble; they were exploring the rubble and managed to find the headless body of Quire with him to blame for what happened along with Frankenstein's body which was accredited to a monster minion of Quire. The Nefaria family and their allies were quite upset but with those reportedly responsible dead there was nothing that could be done. J, Jonah Jameson was ranting about powerful menaces targeting powerful people and almost causing international incidents.
In a lab Walker was talking to Ross; "General Ross sir; I am sorry that we were unable to stop the loss of the assets of Frankenstein and Midnight." Walker told Ross who had the biggest grin on his face.
"No need to apologise Lieutenant Walker as they were all disposable and I consider this mission a success. This incident won't be led back to us and besides... The new asset makes up for the losses a hundred times over..." Ross then replied as they were looking at a chamber housing the unconscious body of Nefaria.
If I was able to write it all down; this would have been up around the time that the Thunderbolts had appeared in the main fic so this would be the origin of the original team.