THE ULTIMATE SHOWDOWN! G.I. JOE has escaped the situation in Sierra Gordo intact… but COBRA has taken over their headquarters! That means only one thing: it's time for a head-to-head confrontation between America's best and the villainous COBRA COMMANDER's forces. Join the battle in G.I. Joe: A Real American Hero #199 and prepare for everything to change in next month's landmark issue #200!