A new Superboy, a clone created to replace the seemingly dead Superman (as opposed to a younger version of Superman), was introduced in 1993. His initial abilities were based on a form of telekinesis (known as "tactile telekinesis") by which he could fly and simulate Superman's strength and invulnerability. He was spun off to his own series, which ran for 100 issues until it was cancelled following a drop in sales after a change in story direction by DC writer Joe Kelly. "The Kid" was created by Project Cadmus; most of the series had him living in Hawaii. Prior to Kelly's run, the character lived at Cadmus with reintroduced concepts originally created by Jack Kirby.
Under Kelly's direction, Superboy attempted to update his trendiness to the opposite sex and the public, while deciding to move on to other things as Cadmus faced a shutdown by the US government. After Kelly's departure, Jimmy Palmiotti and Dan Didio co-wrote Superboy, and gave Superboy a new direction as the superintendent for a slum apartment building in a Metropolis ghetto area called "Suicide Slum". Sales improved but the book was cancelled nonetheless.
Initially it had been thought Kon-El was created only from the genetically engineered human DNA of Cadmus Project director Paul Westfield. Later it was revealed that Superboy had been created from both Superman's and the human DNA. Westfield's DNA, however, had been replaced with that of Lex Luthor, and the developing clone brainwashed so that Luthor could have a sleeper agent among the superhero community. This eventually led to near disaster, but Superboy eventually became free of Luthor's control. Luthor, however, continued to at least claim that he viewed Kon-El as his son.
This version of Superboy was highly involved with the young superhero group, the Teen Titans. He was best friends with Robin the Boy Wonder and romantically involved with Wonder Girl. Kon-El later sacrificed his life in the Infinite Crisis series in an outmatched battle with Superboy Prime. After his death a statue is erected in Metropolis and Robin secretely researches cloning a new Superboy.
In Infinite Crisis #7, Alexander Luthor finds that New Earth's history has changed once again, and there are several reports of Superman's activities prior to his first appearance in Metropolis. In a 'flash-forward' scene in Justice League of America #0, Superman fills up the tunnel leading from his bedroom, much like the pre-crisis Silver Age Superboy used. When asked about the status of Superboy in New Earth, Dan Didio and Geoff Johns replied "keep reading" at several comic cons, including the San Diego Comic Con, and Wizard World Chicago 2006.
In Superman #656 it is revealed that during Clark Kent's youth, there were reports throughout midwestern America of a 'super-boy' performing super-powered good deeds, but quickly disappearing, no one getting a good look at him. It seems this was indeed young Clark, but nothing has been said about him having used the familiar costume in that role. His actions may simply have been similar to what's seen on the show Smallville, namely young Clark secretly using his abilities to help out where needed. Although continuity is no longer based on the Man of Steel or Birthright explanations, a true Superboy career would possibly complicate previous stories, resulting in large retcons.