Here is the first leaked picture of the upcoming Voigtlander ULTRON 75mm f/1.9 SC/MC VM lens for Leica M-mount - the official announcement is expected later this month (January) while shipping should start later in February:
Cosina is rumored to announce a total of three new Voigtlander lenses this month:
Source: Digicame-info, via LeicaRumors