A rumored 12-core Kaby Lake-X CPU may come to market as the "Core i9-7920X" under the new naming convention instead of the "Core i7-7920X" to better differentiate the super high-end X-series from the high-end i7 series.
http://www.notebookcheck.net/Intel-Skylake-X-and-Kaby-Lake-X-could-launch-as-the-Core-i9-series.221050.0.html