Intel's upcoming desktop CPU lineup, making use of the Sunrise Point (AKA Intel 100 series) chipset and LGA1151 socket, is scheduled for release later this year and will be Intel's first major mainstream desktop platform update since Haswell in 2013. Rather than piggy-backing the 5000-series and causing potential confusion, the new CPUs will utilise a 6000-series naming convention, with a top-end listed as the Core i7-6700K according to a report by Fudzilla.
It appears that Intel are returning to an ever so slightly more intuitive naming scheme with the 6000-series of desktop CPUs. The report indicates that the upcoming range of CPUs will feature the Core i7-6700 & 6700K at the very top rather than a derivative of the slightly more complex 4770K/4790K seen during the current Haswell era, whilst the top-end mainstream SKU will be the Core i5-6600K. This naming convention echoes the Sandy Bridge era (with the exception of parts where graphics cores has been fused off), and is just a little more straightforward than SKU formulations following IvyBridge and IvyBridge-E.
Interestingly it's believed that processors based on the 14nm Skylake microarchitecture will typically support either DDR4 or DDR3L, potentially allowing either a higher bandwidth use case or slightly more affordable platform cost. As a 14nm part it's also expected to be far more thermally efficient than 20nm Haswell designs, although with a 95W TDP on the performance parts it's likely that they have plenty of headroom for Turbo modes and overclocking. Unsurprisingly the 6700K is a typical quad-core with hyperthreading and 8MB L3 cache part, whilst the 6600K nixes hyperthreading and downgrades the cache to 6MB in favour of a lower price point. Naturally the 'K' moniker indicates an unlocked multiplier suitable for overclocking, whilst equivalent 'locked' i7-6700 and i5-6600 SKUs are also likely.
For a wider summary of the 6000-series check out the meat of the source article. More detailed information on Skylake-S and the Sunrise Point chipset is expected on or before Computex2015, with a release date to follow.