We all really know its necrons next, so here is another source declaring that we will see a huge "dark eldar" style release the first week of September. Do not fear Sisters players, your codex will be here before years end.
Like all rumors, take with a grain of salt.
Necrons drop fist week of Sept. They could push up to last week of August. July white dwarf backside and sneaks inside. August release issue. All models redone entirely. Warriors new package and option but same mold. Think Dark Eldar launch.