From Michael Reichman at LL:
"A Leica MF (Medium Format) system is almost definitely on the horizon, but specifics will have to wait for an official announcement.
Apparently there are still many details to be resolved, so don't believe much of what you read, other than the fact that something is cooking.
With No R lenses coming at PK and with Kaufmann simply referring to 'reflex' vs R10 or R-line and with all the Jenoptik (sic?) hugs & kisses of late, the new R looks like it may very well NOT be a 35mm SLR.
Makes more sense for them to enter the awakening MFDB sub-market with a partner than try and develop a manual focus uber-ISO 35mm DSLR - they'd get their lunch eaten for them. Stick to manual focus uber-glass and (relatively) low-ISO performance sans AA filter.
IF true, they may allow it to have a sub-MF mode (like D3 Dx mode) that would allow older R glass to be used via some $1000 adapter (;>).
I don't even want to guess what the all-in price would be for a decent kit. My heart isn't that strong.