According to rumors coming from China, the Xperia XZ Pro will have a 5.7-inch OLED screen with 4K resolution, really slimmer bezels and possibly an 18:9 aspect ratio.
The new Xperia XZ Pro phone will be powered by Qualcomm's Snapdragon 845 SoC with 6GB of RAM and up to 128GB of internal storage.
The rest of the rumored specifications include a dual rear camera setup with an 18-megapixel and 12-megapixel sensors as well as a 13-megapixel camera at the front for selfies. The Xperia XZ Pro is likely to be IP68 water and dust resistant and use a decent 3,420 mAh battery.
The source suggests a price of over CNY 6,000 in China (US $931/€758), so you can expect a high price tag in the rest of the world as well.