Well, having been to the factory this last Feb, Tim's story at this time is that the design is frozen, awaiting the powerplant type to be used, turbine or likely diesel. Frank tried to get an allison C20, but they balked at the price.
Other than that, I can say that the design is a new one, not a revamp of the 22 or even the 44, but they want to take this design and be able to expand it to even a larger heli, as the 44 was done from the 22. (as RobboRider has said).
Of course the other factory floor is coming along nicely, and should be finished this year ... We'll have to wait and see.