One thing fans always ask me at a convention is, "How do I get a Jim Lee sketch?" And the only thing I'd suggest is patience. I remember asking him about it once myself, before I started working at WildStorm, and he said whoever was persistent enough would eventually get a sketch. Simple, right?
You may get lucky and land one on your first try, but if not, there's always the next show. Or the one after that, but he's got a great memory for faces, so keep trying. And the best part is he doesn't charge anything, so they're free! You just have to be patient.
With Saturn Girl here, Jim went retro using her classic outfit and turned out another great piece from the Planet Comicon show. Hopefully, he'll get to draw her and the rest of The Legion of Super-Heroes someday too.