Recently Kotaku (via Sang of http://rra.go.kr/board/device/view.jsp?app_no=201317100000104283) reported news that a new PS3 SuperSlim Model CECH-4200 alongside it's Asia counterparts CECH-4205B and CECH-4205C are expected to arrive soon.
Below are the details, to quote: "In South Korea, Sony just filed for certification for two new PS3 models: CECH-4205B and CECH-4205C. As tipster Sang points out, these could be slightly modified versions of the "Super Slim PS3s" (model number CECH-4000, image above) with smaller nanometer architecture, less power consumption, and better cooling.
Earlier this month, new PS3 models also surfaced on a webpage for Japan's Minister of Internal Affairs and Communications. That listing was for "CECH-4200". The assumption is that the difference between "CECH-4200" and "CECH-4205" is regional for Japan and South Korea."
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