DC will cancel four New 52 titles after the release of their August issues:  Demon Knights, Dial H, Legion of Super-Heroes, and Threshold.  All four sold between 12,500 and 16,500 in North American sales, according to ICv2 estimates (see "Top 300 Comics--April 2013").  Perhaps most surprising of the four was Legion of Superheroes, which sold over 2500 more than the next highest title.

Sales on the April issues of the canceled titles were:

16,015  Legion of Super-Heroes 
13,355  Dial H 
12,941  Demon Knights 
12,811  Threshold #8