The only thing that would put a wrench in my plans if this cost more than $3,000. This might be one of those things where I wait until 2016 to get, keep my A99 for another year and then pull the trigger once the price drops.
My guess is around $2500, though $3000 would not surprise me.
But here are the questions:
Will it be a single model that tries to make everyone happy.... Which is pretty difficult to do. Not everyone wants/needs 36+ mp... some are more concerned with smaller files and a more responsive camera.
IF it is an A9 + A9r..... I could see the A9 being 2k-2300. While the A9r may fall in the $2500+ range.
Putting aside price of the camera body as a factor, there is the question of whether to change your lenses.... Sell your lenses and get all new lenses.. Which will *probably* be necessary for the best AF performance. (Assuming it works the same way as the A6000). It will also be necessary if you want stabilized lenses.
Option 2-- Keep your better lenses and use them with a mirrorless adapter -- lets your mostly keep the IQ, but slow autofocus. Or Option 3--use a mirrored adapter -- adding bulk to the camera, and reducing the low light performance, but giving you dSLR autofocus.
Basically, the A9 might be a truly fantastic camera. But switching to it, I don't see as upgrading an A-mount body. It's really switching systems, no different than switching to Nikon or Canon. I do suspect it will be a successful system, and I do suspect it will draw people away from Canon and Nikon. The A7 series is already drawing some pros... so fix most of the A7 shortcomings, and it should be a winner.
And I miss you Sony people.. I enjoyed our little Sony community on this board.