I'd love to see Walt draw Trigon in a battle against John Constantine and Swamp Thing and all the dark and magical DC characters. Kevin has talked to Tara Strong who voiced Trigon's daughter Raven on the Teen Titan's animated series. A great comics and animation themed episode of Fatman on Batman.
Keeping with the demonic theme, here is Blue Devil. I can dig the old design, but I like his design from his Shadowpact days. The t-shirt and jeans is much cooler, even if it does feel like he's ripping off Hellboy a bit.
The new 52 design I don't find so engaging, cause it keeps him small and looking a little bit like he's in a fetish club. I like the way they treat his origin and mythology. The movie studio that gave him the suit puts magical objects in really bad horror movies so that they lose their power, because people's disbelief in dark magic weakens it's power.