From what I understand, Excavator will be the last module setup except for the X86/ARM combo and low end APUs. From what I see since Jim Keller is back at AMD. He is working on a new high performance X86 CPU architecture. Doing a single core design with high IPC, with up to 8 cores and 16 threads for servers and desktops. Instead of the module design they will be full single cores using something similar to Intels HT. From what I hear, sometime in late 2015.