The Spanish website dslrmagazine.com and its owner Valentin Sama heve been a reliable source of photo equipment news in the past. Today they twitted that Leica is almost ready with its mirrorless camera:
"Sources that usually are very well informed are telling us that Leica could have an almost ready CSC or mirrorless camera" (source)
"It's not known by now if the possible CSC or mirrorless from Leica would be a Panasonic clone or, maybe more probably, a custom creation" (source)
Rumors of a mirrorless solution from Leica have been going around for a while. The cameras is expected to be compatible with old Leica R lenses.