Intel has teased its next-gen Core i7-6950X processor on its own website, with the entry for the "Intel Core i7-6950X Processor Extreme Edition" listed on the latest Management Engine software on its Support website.
If Intel hasn't stuffed something up, the Core i7-6950X should feature 10 CPU cores (20 threads thanks to HT), with 25MB of L3 cache and up to 3.5GHz for the clock speed. The other CPUs teased are the Core i7-6800 and the Core i7-6900 which are six- and eight-core CPUs, respectively.
These new CPUs are based on Intel's 14nm Broadwell-E silicon, but the new LGA 2011 v3 processors are set to be compatible with Intel's current X99 Express chipset motherboards, with future BIOS upgrades. We should hopefully hear more about Intel's next-gen CPUs soon, before they start shipping in the coming months.