Once again it’s the networks that have poured big money into blanketing downtown San Diego’s Gaslamp Quarter in promo materials, with a few exceptions. Here’s what’s greeting Comic-Congoers on the ground as Wednesday’s Preview Night kicks into gear ahead of the Thursday-to-Sunday rush (check back for more glimpses from geek ground zero throughout the week): Related: Comic-Con 2013: TV Outrunning Film As Race To Blanket San Diego Hits High Gear (PHOTOS) NBC’s Constantine (above) has a blazing standee of star Matt Ryan on display to get audiences used to seeing the Welsh thesp as DC Comics antihero John Constantine.