Alan Moore continues the stories with the SMAX mini-series. Different artist, but same writer, it tells of Officer Smax's visit to his homeworld. His partner, Toybox comes with him and sees why he's so angry all the time.
After that a Top Ten series did come out, but it wasn't by Moore or Gene Ha, so I didn't like it. But they did later make Top Ten: the Forty-Niners. It tells the story of a young Steve Trayner a.k.a Jetlad, and his first days in the city of Neopolis. A definite gem. There's also a one-issue background story by Gene Ha where he gives the 411 on the characters and draws the entire city.