CameraBeta posted what they claim to be the LX200 specs:
20-megapixel Live MOS sensor (from Sony)
DFD focusing to achieve focusing speed in 0.07 seconds.
Larger OLED viewfinder.
GX8 alike tiltable LCD.
Built-in ND filter.
Highest ISO 51200.
More filter effects.
Built-in flash.
But really, dont know if that’s a somehow reliable rumor or just a good guess (I think it’s the latter).