Wizkids Announces Manufacturer Sell-Out Press Release: WizKids Inc. announces the manufacturer sell-out of their most recent set, Marvel HeroClix®: Giant-Size X-Men (GSX).  WizKids’ entire inventory of Marvel Giant-Size X-Men, releasing March 16th, 2011 has been completely sold to distributors worldwide. The X-Men burst onto the scene in this latest HeroClix expansion dedicated to Marvel’s “First Family”…