If I look at this issue then two things come to my mind as why there is little information and only the strange question about could be almost as expensive as the K-1 (like minus 10%).
scenario A
What future would this new camera need to justify this hi price? It lacks the larger sensor of the K-1, but gets in shops for almost the same price. So what would it need that compensates for that in technology that isn't in any current Pentax camera? That would probably speed.....
* speedy auto focus and tracking
* speedy image handling and writing to card
* speedy handling of pixels to have 4k video
So these things take time. But they are not exclusively for very expensive camera's by the time it will see market.
scenario B
Ricoh-Imaging knows how to make camera's, so that would not be the issue. This hi-end camera is only for a small group of customers. Those who can afford a K-1, have a nice set of lenses but also would like a hi-end aps-c camera to go with that. A camera that is faster working (well 8,3fps is no issue, smaller files of 20-24 mp can go faster) and gives them options that the K-1 would miss. I don't see any issue in this for Pentax to make. So where is the problem?
* This is a camera that would run in production for like 4 years. We are now used to that. This is a camera for a small crowd. Making a camera has costs for development, cost for making production ready and cost for the actual manufactoring. So if you estimated to sell like 50.000 units of this camera and start with an initial production of 2500 units a month.........then it would probably cost between 1700-2000 USD.....
Looking at how sales of dslr is developing in Japan
http://www.cipa.jp/stats/documents/e/d-201704_e.pdf I would say that maybe someone is giving this project a red flag for the time being.
We will see when time is coming.....