The idea for this has been kicking around in my head for some time now and I finally decided to do it. Hal's head gave me a lot of problems here, partly because I'm not used to doing superheroes in a simplified form. I just kept putting too much detail in him. I'm comfortable with the way he turned out though.
Also have sketches for a number of other fictional places within the DC Universe. Gotham, Central City, and of course ... Mogo!?
Pretty much used the pen and type tool in Adobe Illustrator CS4 for everything here.