This is a quick write-up of the basic plot. I'll expand on it later.
The Guardians are the world's premier superteam, comprised of the world's most experienced, respected and iconic superheroes. There's not a person on Earth who doesn't know their face and they have become the face heroism. What most people don't know is that several members of the team have teenaged apprentices that they are training to become heroes themselves.
- Watchman, the vigilante crusader of Bedlam City, has Bullseye, a cocky young archer he's been training for the job for nearly a decade.
- Ocean Man, a Prince of Atlantis, is training his illegitimate, half-Atlantean son codenamed Waverider, a hipster hydromancer who grew up on the surface world.
- Redline, the fastest man alive and protector of Emerald City, has been running with Zip-Line, an ADD retro-grunge-hipster with a love of video games, classic music and kicking bad-guy ass.
- Beast Master, the lord of the wilds, has taken in Feral, a vicious young half-man/half-monster who was the result of an experiment by the sinister Dr. Simian.
This particular day, the Guardians were to meet a collection of government representatives including the Vice President to discuss possible new restrictions on the laws governing superhero activity. As a way of introducing their sidekicks to the art of diplomacy and negotiation, it was decided that the sidekicks would come along and watch, taking notes on the whole affair.
The team and their apprentices met in Liberty City's city hall. After a brief introduction by their mentors, the meeting began. However, an earthquake in Rome called for the Guardians' attention, causing them to hastily leave, tasking the sidekicks to "hold down the fort" in their absence. Being a group of teenagers, they proceeded to do the opposite.
They left city hall, hit up a Starbucks and then went to the mall, where they checked out an FYE and a Barnes & Noble, derped around a little and had some lunch before starting to head back, though just as they were getting ready to leave, a group of armed thugs started to rob one of the stores in the mall. The sidekicks made quick work of them and peaced, on a rush from the brief battle.
By the time they got back to City Hall, they heard screams of panic as an alien ship descended on City Hall, bringing up a force field to keep law enforcement out. The band of sidekicks debated on what to do, with Waverider insisting they wait for the Guardians to return but Bullseye figured they didn't have time. They realized it was on them to drive the aliens out and protect the people inside.
First, to get inside, they had to get into the alien drop-ship and figure out a way to switch off the force field generator. They saw three armed and armored alien soldiers guarding the ship and Bullseye decided he might be able to use an EMP to disable the ship if he could get inside, tasking Waverider, Feral and Zip-Line to take out the soldiers.
The fight started with a bang as Zip-Line crashed into his opponent and Feral and Waverider followed-through with powerful attacks, Waverider directing a poweful blast of water that knocked his opponent to the ground and Feral tearing through the armor of his foe with his unbreakable claws. Bullseye made it into the ship, though he was distraught to discover that he couldn't figure out where to use his localized EMP to take out the generator. Zip-Line rushed in and used his knowledge of science and tech to figure out where the largest source of power had been partitioned to give Bullseye the info he needed to take the Drop-Ship out.
Afterward, the four of them burst into city hall and took out more soldiers, including one in a huge suit of powered armor, and saved a bunch of hostages. After interrogating a fallen alien soldier, they ran to the court-room where the aliens—named the Combine—had gathered the leaders who has met to talk with the Guardians and were using some sort of jelly-fish-like organic machines to extract information from their minds.
The sidekicks fought against the Combine and their field leader. It was a brutal fight, but the sidekicks eventually had the bad guy against the ropes. However, at the last second, the drop-ship came back online and filled the courtroom with turret fire. The group had to dive for cover and protect the innocents while the Combine leader and his remaining soldiers escaped. IN the aftermath, the Combine soldiers left behind initiated a suicide protocol in their armor that shocked them to death.
The Guardians returned soon after and despite the shock of the blatant attack by a hostile alien force, congratulated their sidekicks on their good work. They left not long after and took their sidekicks up to their satellite headquarters and after a private meeting between the Guardians, it was decided: due to their good work fighting off the Combine, the sidekicks would be formed into their own shadow team to go places and perform missions that the Guardians could not due to their high profiles. They would operate out of a safehouse in Emerald City and continue training while not on missions for the Guardians.
The four were totally hyped to be a part of their own group apart from their mentors (except Feral; but he hates everything) and Hyperion, the unofficial leader of the Guardians, had a good idea of another young hero who could join the team…