DC just posted a preview of the upcoming Justice League: Cry for Justice #1 mini series. It's going to be 6 issues written by James Robinson with art by Mauro Cascioli.
General idea of the series can be summed up by Green Lanterns quote on the preview page "I'm saying this will not stand. I'm saying they hurt us, we hurt them back." which is pretty intense! The deaths of Batman and Manhunter kick start a few members of the JLA & JSA to seek out those responsible.
On sale July 1st