Complex sentence: Nauck initially published the characters in 1993, in ashcan comics he published while sending out submissions; after making a name for himself working on "Young Justice" for DC Comics, his earlier creation was picked up for publication in 2003.
Split into simpler sentences: Nauck initially published the characters in 1993, in ashcan comics he published while sending out submissions. After making a name for himself working on "Young Justice" for DC Comics his earlier creation was picked up for publication in 2003.