Some more rumors and speculations about the unannounced Sony Xperia Z2 now says that Sony is no longer going to introduce flagship devices at CES, and that the Xperia Z2 will be announced in April 2014 instead.
Some rumors has also said that it will have a 5.5-inch display but personally I believe the rumor that it will have a 5.2-inch is more credible.
Here is what’s believed the Xperia Z2 will have: a 5.2 inch IGZO Triluminos display with a pixel density of 506ppi, 20.7 megapixel camera with Xenon flash, Android 4.4 KitKat, Qualcomm Snapdragon 800, 3GB of RAM memory and a 3200mAh battery. The battery sounds a bit weak with such high ppi on the display though.
But as I said, this is just rumors and speculations, with no reliable source.