This variant was shipped to retailers to demonstrate the folded cover to customers. 1 per store.
This issue is a variant of Batman (DC, 2011 series) #19 [Direct Sales].
There exist further variants:
Batman [Bruce Wayne]; Robin [Damian Wayne] (flashback); Alfred Pennyworth; Commissioner James Gordon; Harvey Bullock; Martha; Clayface [Basil Karlo; also as Brian Wade; also as Lucius Fox] (villain); Reaper [Benjamin Gruener] (villain)