I don't have the issue in front of me but remember the scene when Micro Lad and was it... Light Lass...are feuding with the SP's? Invisible Kid appears as if he has been hiding from the SP's. If that scene comes after the "figure in the shadows" scene, Invisible Kid conceivably could be returning from his stealthy meeting from Brainy.

If so, my guess is Invisible Kid is in the shadows.

If not, well.. then I'm an idiot.