From 1991 to 1994, John Byrne developed his own creator-owned titles at Dark Horse Comics under the Legend imprint, as did other artists and writers such as Mike Mignola, Arthur Adams and Frank Miller.

Danger Unlimited was intended as an ongoing series, but it ended abruptly after just four issues at Byrne's decision, due to less-than-anticipated sales brought on in part by the mid-1990s collapse of the American comic industry.

Byrne had intended the series to capture a wider, younger audience with a lower cover price and no content that would require a "mature" warning.

Low pre-sales and long lead times gave him less revenue, so he made the decision that it was unprofitable to continue work on the title.

Each issue included an additional story featuring Torch of Liberty, an American superhero similar to Captain America.

In December 1959, the Carson family meets with famous explorer Mike Worley in South America to investigate an ancient, giant spaceship that had crashed in the Amazon jungle in the distant past.

Their father, Doc Danger (Dr. Robert Carson), is a brilliant scientist who had his intellect augmented even more, continuing his mutation over the years with an increasingly enlarged cranium and atrophied limbs until he became nothing more than an enormous head by 1985, supported by a flying platform with robotic manipulator arms.

Nobody knows what happened after that, but Doc Danger shuts down all systems and seals the headquarters in a force field with a time lock set to disengage in 75 years.

A sample of Gunk was also stored inside the pod and explodes over Corporal Teresa LaFayette, a fan of Danger Unlimited.

Professor Davis Palmenter, who was studying what happened to Teresa, realizes it was Gunk at work again and smashes the sample vial of it with his hand.

Captain Brewster, Teresa's commanding officer and also a freedom sympathizer, explains to Calvin that an alien race called the Xlerii invaded Earth in 2010.

Brewster gives Calvin a mnemonic stimulator to help him recall memories of his past life with Danger Unlimited.

A previously unpublished page on John Byrne's website — finished, colored and lettered -- shows two unidentified characters sneaking through a top security Xlerii holding facility to find the corpse of Calvin Carson in a morgue-like drawer after finding out that Captain Brewster had previously inspected the drawer.

He appears to be a cyborg with a mechanical left arm and his head is a bare skull underneath a transparent dome.