There isn't much news on the 8000 series.
There are some possible leaked documentshttp://www.techpowerup.com/176568/Probable-Radeon-HD-8000-Series-GPU-Specifications-Surface.html
But I would expect that we will see new geforce and radeon cards 1st quarter this year. But remember, with video cards you will often not know exactly what a card is until it is released. Cards kind of just seem to appear on the market.