NVidia Chief Scientist Bill Dally has informally announced a new Fermi card, the GTX485, in an interview. ExPreview has the scoop:
As expected, the GTX 485 that basing on GF100 Fermi GPU will have 512 CUDA / 64 TMUs/48 ROPs; Core/Shader gets set to720/1440MHz, higher than GTX480; The rest specs remain the same.
via Basing on the whole GF100，GTX485 will appear in Fall – Expreview.com.
if you are interested in further rumors to gtx400-cards, here is a table with collected rumors und some pics of gf104:
http://www.hwmag.de/grafikkarten/neue-geruchte-zur-gtx460-gtx485-und-gtx490
maybe there will be a gtx468 based on gf104 to replace the gtx465 based on gf100.