http://www.comicscontinuum.com/stories/1206/11/dcsept.htm

I noticed that although DC announced that 4 titles were being cancelled to make way for the 4 newly announced titles,  only the already announced JLI is not getting a Zero issue.  So, either three titles are ending with their Zero issues or there may be some overlap so they can finish storylines and they'll end in another month or two.

Also noticed that in-progress mini-series (Phantom Lady, Shade, etc) seem to skip September to avoid clashing with the Zero issue theme.