Zeiss published a new teaser on their Facebook page for three new lenses with the text:
Well, well! We have prepared something very special for you. Stay tuned! More to come next week. #enterZEISS
One of them looks like the previously rumored Zeiss Milvus 135mm f/2 Apo Sonnar. The second lens will most likely be for Sony E-mount. Stay tuned for the official announcement next week.
Via Nikonrumors
Update - false alarm, Zeiss posted this on Facebook:
We're sorry but #enterZEISS is not about new lenses. It will be great nonetheless. So please stay tuned for next week!