How about this plus a few other sites that I couldn't be bothered to copy: http://www.technobuffalo.com/2015/11/03/galaxy-s7-camera-specs-features-rumors/
A 12MP camera wouldn't be going backwards. It would be the opposite. Especially if they put that 1/2" sensor, it would be a beast of a camera, because the pixels would be about 1.8μm as opposed to the mere 1μm that they are now. Plus, who needs more than 12MP anyway?
I'd prefer this direction as well. I'd rather have a larger sensor with bigger pixels any day over a higher number of smaller pixels. Now if they went with fewer pixels of the same size, that wouldn't make sense.