Complex sentence: Jet is the name of a comic book character from the Wildstorm universe that was featured in Gen-Active and the Wildstorm Thunderbook in 2000 before appearing in her own four-issue miniseries by artist Dustin Nguyen and writers Dan Abnett and Andy Lanning.
Split into simpler sentences: Jet is the name of a comic book character from the Wildstorm Universe. Since then Jet has featured in "Gen-Active" and the "Wildstorm Thunderbook" in 2000 before appearing in her own four-issue mini-series by artist Dustin Nguyen and writers Dan Abnett and Andy Lanning.