I can't say for sure, but that was my initial reaction to the ending of the last issue. After all,
General Frank Rock was killed during the "Our Worlds at War" crossover, yet showed up alive running a new Suicide Squad. But at the end of the last issue, his face is revealed to be a mask, which he peels off and drops on the floor before he leaves. So "Rock" was an imposter.
The other theory I've read is that Rock was actually
, which is also a pretty cool idea.