Here are the first Leica M12 camera rumors - the new M12 will be 3mm shorter compared to the M11:
The ISO dial on the top left could be completely removed (first picture). A new dial could be introduced behind the shutter button that can be controlled with the thumb (first picture). A new large 3.9″ screen could be introduced (the M11 has a 2.95″ screen):
The large screen also means removing all buttons from the back of the camera – it seems that the controls will now be on the touchscreen, similar to the Leica TL:
