"A mysterious force ripples across the DC Universe, trying to warn the World's Greatest Heroes of an impending threat! That force? A returning Wally West! But what has the former Kid Flash seen? And who or what is he running from? It all begins here. Do not skip to the last page. Do not let a friend or message board ruin this comic for you. The future (and past) of the DC Universe starts here. Don't say we didn't warn you!"-- Provided by publisher.