It seems that the Toyota Prius has been delayed and we could have to wait for some months before seeing it. This would mean that the car wouldn’t arrive before the end of 2015.
The delay is said to be down to the fact that Toyota were not too happy about the efficiency of the 4th gen Toyota Prius. They are therefore delaying the new version to make sure that improvements are made. We haven’t heard anything official though, this is purely speculation.
If it is true then the car would not go into production before December 2015 and we could expect it to arrive on the market at some point in 2016. Of course until Toyota speaks up this is just speculation.