Google linked me to gtx 980 ti because of a misclick whilst searching. I found this. (Source 1) What interests me most is the, "new GPU can perform 50% higher than the current GTX Titan Black and double that of the 780 Ti" and whats more will do it using less power. This goes on to suggest that a duel core gtx 990 test samples have been sent out to customers.
The article links to another source (Source 2), suggesting the new cards will feature significantly larger memory buses whilst sticking with the 28nm architecture.
Supposedly coming out in Q4 of 2014 could this be a Christmas present from Nvidia?
Source 1: http://www.eteknix.com/next-generation-nvidia-gpu-leaked/
Source 2: http://webcache.googleusercontent.com/search?q=cache:http://pctuning.tyden.cz/component/content/article/1-aktualni-zpravy/30978-geforce-gtx-990-a-nejspis-i-titan-x-na-ceste