According to Android Authority, LG is aiming to launch a successor to the G Flex at CES 2015 (January 2015). According to the blog, the G Flex 2 will be a major upgrade with a higher-resolution plastic-based OLEDs and a smaller form factor. Reportedly it will be more flexible than the original G Flex.
This is interesting - earlier this month it was reported in an Israeli newspaper that LG Electronics is developing a mini-version of the curved G Flex phone. It will be great to see another flexible OLED phone from LG.