Cliffhanger was actually just the name of a subset of Wildstorm. I actually remember enjoying a Danger Girl issue or two, including a romp with Batman. Which is worth the price of entry for Leinil Yu art.
Battle Chasers and Crimson I really know little of outside this sketchbook. According to the Wiki they merged with Homage (I remember Homage being home to Astro City but still a Wildstorm offshoot). DC owns it all now and I'm sure in ten years when they reboot their universe once more they will pop out these random titles again.