TweakTown picked up two rumors. First up is news that Intel is planning to launch Haswell at Computex (June 2013) on the Z87 platform as the mid-range solution, much like the previous-gen Z77. Secondly, the site also heard that Intel's next-generation performance range of processors will be launched towards the end of the year, and not in 2014 as previously rumored. Tweaktown says their source wasn't entirely clear, but notes that Ivy Bridge-E may be skipped in favor of Haswell-E, and that this CPU will be launched together with the X99 chipset.
While we suspect this to be Ivy Bridge-E based, our source wasn't exactly clear and it could end up being Haswell-E, with Ivy Bridge-E being skipped. We do know, however, that the next-gen performance chip will make use of a chipset called X99. A quick Google for "X99" turns up relatively little and basically nothing about an Intel chipset.