There are already three phones in the P9 family:
the normal P9
the P9 Plus
the P9 Lite.
It looks like there may be yet another new member coming soon, called the Huawei P9 Max.
The device with such name has appeared on the benchmark website GFXBench.
It has:
a 6.9-inch 1080p display
a 16 MP rear camera
an 8 MP selfie snapper
3GB of RAM
32GB of built-in storage.
It runs the newest Android 6.0 Marshmallow.