Published by XperiaBlog, the images show what is said to be Android 4.4.2 KitKat running on the handset with Sony's own software atop of it.
The screenshots suggest that the Xperia Z1 successor will feature several major camera improvements, including 4K video recording and a 'Timeshift video' mode that lets users shoot at a high frame-rate and apply slow-motion effects.
Sony's next flagship also appears to include numerous display-related enhancements, such as the ability to use the touchscreen while wearing gloves and wake the device with a double tap.
Smart call features will apparently enable users to reject calls by shaking their handset, and answer them by bringing it to their ear, while smart backlight control will prevent the screen from going to sleep while the user is looking at it.
Xperia Z2 owners are also expected to be given greater control over their home screen layout, with a stripped-down Simple Home option available in addition to the standard Xperia Home setting.
Sony has been tipped to unveil the Xperia Z2 at the Mobile World Congress next month, which takes place in Barcelona between February 24 and 27.
Watch Digital Spy go hands-on with the Sony Xperia Z1 below: