Nikon working on a new Coolpix camera with a large(-r) sensor

Nikon is currently working on a new camera with a large(-r) sensor to compete with the Canon PowerShot G1X ($799). It's not clear if Nikon will just use the 1" sensor from their mirrorless line or they will go with a new 1.5" sensor similar to the G1X. The current Coolpix P7100 camera has 1/1.7" CCD sensor. For better illustration, here is a diagram for the different sensor sizes from Wikipedia:

I am also not sure if the new camera will be a replacement for the Coolpix P7100 or it will be a completely new product line.