A Silhouette has been revealed on Pangya Japan's mailmag Vol.376 on what appears to be new outfit sets coming soon that's related to Ice Inferno. We'll label it as Ice Inferno sets for now.
The outfits has been revealed already from the Ice Inferno promotional video. As you can see, Max is wearing one of his Halloween outfit with the swimsuit hairstyle and Nell wearing the Project G vol. 2 outfit. The rest of the cast are wearing new outfits that hasn't been released yet.
Ice Inferno course will be releasing on Pangya Japan February 8th. Other servers has not been announced yet. Although Korea will updating something tomorrow, I haven't seen a slightest hint of a new course from them yet.
Thanks Kelly for the links of the visible illustrations.