Gravity's History
Greg Willis moved to New York to attend New York University. He immediately encountered Black Death and Rage; because of a misunderstanding, Black Death escaped. After beating the Rhino, he became a target of the Daily Bugle, especially because of the symbol on his chest (could be mistaken for an X, used by many mutant teams, such as the X-Men; Willis may or may not be a mutant). For a time Gravity partnered with another hero called the Greenwich Guardian, who turned out to be Black Death and escaped again. Gravity also defeated Brushfire.
Other people in Willis' life included "Frog," his roommate, and Lauren Singh, another student.
Gravity was one of the heroes taken to Battleworld, along with Spider-Man (Impostor), Medusa, Wasp, Firebird, Venom and Henry Pym by a being claiming to be the Beyonder. Later, when Uatu the Watcher appeared, the 'Beyonder' was proven to be a hoax, It ended up being another cosmic entity known as The Stranger. The being then decided to destroy the planet, setting it to self destruct. Gravity forfeited his life to hold it together long enough for the others to escape.
Most recently, the new Fantastic Four found out that Gravity's grave had been desecrated. They followed a trail and found that he had been put into a cocoon by Epoch. This was fought over briefly by the Silver Surfer and the Fantastic Four, until Gravity emerged as the new Protector Of The Universe, because Quasar lost his life in the recent Annihilation war. Gravity used his powers up to save the being that gave him the powers' life when Galactus came to consume it. This sated Galactus, whom left peacefully. Gravity and the FF returned to Earth and he left for home.
Gravity returned to schooling in Manhattan, but decided to give up his heroing career, leaving his costume behind in Wisconsin. While using his super abilities to fly to New York he encounters Warhead, a member of the Bastards of Evil. Gravity eventually subdues him, but not before Warhead kills innocent bystanders. The encounter convinces Gravity to not give up his heroing career, returning home to retrieve his costume before returning to Manhattan.
Gravity became involved investigating the Bastards of Evil after they attacked Manhattan, including Warhead causing a nuclear explosion at Ground Zero that presumably killed himself in the process. Gravity teamed up with recently unretired superheroine Firestar to learn more about the remaining Bastards. The pair, along with Spider-Girl, Nomad and Toro, defeated the Bastards of Evil and revealed that they were actually kidnapped victims of the Superior, the alleged son of the Leader. When Nomad suggested the group form an official heroing team, Gravity firmly rejected the idea, stating that he was "over the team thing."
Gravity was one of the many young heroes invited to the prom at the Avengers Academy.
The Young Allies were then forced to fight the recently returned Onslaught. Working alongside the Secret Avengers, the Young Allies contended with murderous child soldiers and their remorseless leader, but by working together, they were able to defeat Onslaught.
The Young Allies helped in the battle between the Kree and the Cult of the Negative Zone
Fear Itself
When Commander Steve Rogers requested that Prodigy (Ritchie Gilmore) create a new Initiative of volunteers to combat the growing fear within the nation, Gravity was among the former Initiative members that answered the call. Accompanied by Firestar, Gravity was appointed as co-team leader of one of the sections. His former Heavy Hitters teammate Hardball, recognized as a hero once again due to his role in Camp H.A.M.M.E.R.'s downfall, taunted Gravity for his lack of leadership skill, leading to a confrontation between the two. Komodo and Firestar quickly broke it up.
Spider-Island
The Young Allies also helped defend New York during the Spider-Island incident. On the Hudson River bridge, Gravity fought against Spider-King. Agent Venom (Flash Thompson) arrived and also fought the spider-beast, but was having trouble focusing on the mission. He spotted Gravity and threw him in the air. Spider-King approached him and threatened to kill him if he did not step aside. Gravity fell down on the spider-beast and knocked him out. Working with the other Avengers they were able to save New York.
Gravity was among the many heroes attacked by Carrion-possessed Superior Spider-Man.
Young Avengers
Gravity was among the group of young heroes who arrived when the Young Avengers called "Avengers Assemble." They were nicknamed the Thin Spandex Line. Together they battled Mother, a dangerous interdimensional parasite.
