Maybe to prove that the DC is more than just the big three? That it isn't a one trick pony? Honestly, I don't conisder WW part of the big three... has she really had good stories? I don't feel that way... But that's a whole other argument....
Well, if GL is too big then I can't recommend Sinestro Corps... can I recommend the re-launched JSA? The first six issues are golden. I mean, there is stuff I enjoyed but don't consider amazing. Alan Moore's Swamp Thing is one of the best runs of any super-hero comic ever, and it was in the DCU at that time. Read that.