Zeiss have released a new teaser for a new Sony Alpha a7 series lens on Facebook and Twitter. As previous rumors, this lens could be a new Loxia lens or a new Batis lens.
From Zeiss:
“Hey friends of the Sony α7! At photokina you will have the chance to test a new lens buy Bitcoins in China. The announcement will follow soon! What‘s your guess? #ZEISSphk16″.