Heavy Mettle is a fictional team of supervillains in the Marvel Universe

Marvel Universe

The Marvel Universe is the shared fictional universe where most comic book titles and other media published by Marvel Entertainment take place, including those featuring Marvel's most familiar characters, such as Spider-Man, the Hulk, the X-Men, and the Avengers.The Marvel Universe is further...

.

Fictional organization history

Heavy Mettle was formed by Joseph Manfredi

Blackwing

Blackwing is the name of two fictional Marvel Comics supervillains and one hero.-Joseph Manfredi:Joseph Manfredi was born in Orlando, Florida, and is the son of the crime lord Silvermane. When he debuted, he was a costumed animal trainer for the Ringmaster's Circus of Crime...

, who orders Firestrike

FIRESTRIKE

The FIRESTRIKE laser, introduced by Northrop Grumman on November 13, 2008, is purportedly the first, combat ready, solid state laser weapon. FIRESTRIKE is a 15kW modular laser "building block" which can be combined with other systems for specific missions, or 7 more FIRESTRIKEs for a single 100kW...

 to obtain Turbo

Turbo (comics)

Turbo is the name of two fictional characters in the Marvel Comics universe. One a comic book superheroine, the other a superhero. Michiko "Mickey" Musashi debuted in New Warriors #28 and her ally Michael "Mike" Jeffries in New Warriors #33.-Torpedo Armor:The Torpedo armor was a creation of the...

's costume. Heavy Mettle attacks the New Warriors

New Warriors

The New Warriors is a Marvel Comics superhero team, traditionally consisting of young adult heroes. They first appeared in The Mighty Thor #411 .-General publication history:...

; they are defeated but escape. Nova

Nova (comics)

Nova is a fictional character, a comic book superhero in the Marvel Comics universe. Upon becoming a member of the galaxy's Nova Corps , the youth gained enhanced strength, flight, injury resistance, and a specialized uniform with life support.In May 2011, Nova placed 98th on IGN's Top 100 Comic...

 disguises himself as Firestrike, who helps the New Warriors set up Heavy Mettle. Heavy Mettle is defeated and sent to jail, and Firestrike enters the witness protection program.

Dark Reign

Dark Reign (comics)

"Dark Reign" is a 2008–2009 crossover comic book storyline published by Marvel Comics. It deals with the aftermath of the "Secret Invasion" storyline, which led to a shift of power in the Marvel Universe toward Norman Osborn. The title "Dark Reign" refers to Osborn's rise to national power and the...

The members of Heavy Mettle appear as members of Norman Osborn

Green Goblin

The Green Goblin is a fictional character, a supervillain who appears in the comic books published by Marvel Comics. The character was created by writer Stan Lee and artist Steve Ditko, and first appeared in The Amazing Spider-Man #14 ....

's new Shadow Initiative, an group of super-powered beings intended by Osborn to be expendable. They accompany the team to liberate the Negative Zone prison. Some members of Heavy Mettle are reported killed or incapacitated (Butterball estimates half the team), although Stronghold and Warbow are shown to be alive at the end of the mission.

The surviving members of Heavy Mettle joined in the Siege

Siege (comics)

Siege is a fictional character, owned by Marvel Comics, who exists in the Marvel Universe.-Creative origins:John Kelly was initially created by Dwayne McDuffie and Gregory Wright as a pseudo-preview of their then-upcoming relaunch of Deathlok as well as to provide existing in-continuity backstory...

of Asgard. Warbow is killed, ironically, in a hail of arrows.