I received some information that the Russian camera brand Zenit (KMZ) was in talks with at least one more major brand (other than Leica) about their upcoming new full-frame mirrorless digital camera. Leica was probably just one of several companies Zenit was considering (those rumors started on a Russian forum). It is not clear what is the final outcome, but there is a possibility that Zenit may work together with another major brand and I am not talking about Leica or Sony here.
Stay tuned for updates.