The Sony 85mm is at the moment just a rumour.
There's a rumour that Sony are going to announce 6 (?) new lenses and an 85 could be one of them but it's just a rumour at the mo. If there is going to be a Sony 85mm it'll need to be announced and then hit the shops and no doubt all this will take time, possibly months...
I think I've decided that I'm pretty happy with the lenses I have so I think I'll hold off on an 85mm for now. I seem to like the native 35mm f2.8 and 55mm f1.8 and I have the kit lens should I want to use it so that's 28-70mm covered with wide aperture lenses for 35 and 55mm. I have manual 24mm and 28mm f2.8's, a 35mm f1.8, several 50mm f1.4's, a f1.8 and a f1.2, several 85mm's and 135mm's so if I want a wide or an 85 or 135mm I have them available and as I only use these now and again MF shouldn't be a problem.
I think I might have finished buying stuff for a bit