LGA 3647 is the expected replacement for LGA2011-3. All new animal with hexa channel memory and FPGA from Altera on-board, at least as an option. And they are going to rename the model series X, so Skylake-X, Kabylake-X.
Kind of hope they simplify things on the consumer side by going with K class chipset boards as well. The Z thing has always bugged me.