Confirmed once more: Leica’s next medium format camera will be mirrorless and retain the S-mount

Over a year ago Leica posted this cool Easter egg image teasing a new mirrorless medium format camera. Phototrend now got an official confirmation from Leica that the medium format camera will be mirrorless. Phototrend also writes that the this camera will “retain the S-mount and remain compatible with SLR lenses”. I am surprised it keeps the S-mount. I would have expected it to have a new mount with shorter flange distance and just add a free adapter for S-mount lenses!