This is from the latest Hatchette catalog for their marvel collections.
Ultimates/X-Men will no longer have premiere hardcovers, and go straight to paperbacks. In addition, looks like the only way to get X-Men 13-18 and Ultimates 13-18 will be the DWF/UWS collection (I assume we'll see a tpb of that at some time).
In addition, Venom War will end with issue 23(May) (Five issue arc). And confirms Reconstruction will end with issue #24(May).