Super Secret Crisis War!

Super Secret Crisis War is a 6-issue comic miniseries published by IDW Publishing. It will feature multi-crossover event between five major Cartoon Network shows, including Ed, Edd n Eddy, Powerpuff Girls, Samurai Jack, and Dexter's Labortory. It is to be released in the summer of 2014 with Issue #1.

Summery
IDW Summery

"The devious demon Aku has called together a League of Extraordinary Villains - composed of malevolent miscreants from different cartoon universes. When their evil robots show up in the world's of 'The Powerpuff Girls,' 'Ben 10,' 'Samurai Jack,' 'Dexter's Laboratory' and (even) 'Ed, Edd and Eddy,' it's up to all these fearless heroes to band together and put an end to the League's nefarious plot of inter-dimensional conquest!"