http://www.dearsusan.net/2016/01/22/448-zeiss-milvus-85-best-in-colour-or-bw/

The Zeiss Milvus 100mm f/2 Makro Lens is quite sharp in the center of the frame even wide open at f/2, but especially impressive is this lens' full frame corner image quality. While most lenses show at least some softness in outer portion of the image circle at wide apertures, this lens remains very sharp in this location. Both the site's image quality test results and the MTF measurements show this lens being similarly sharp in the corners as the center, with both being very good.

http://www.the-digital-picture.com/Reviews/Zeiss-Milvus-100mm-f-2M-Lens.aspx

http://www.popphoto.com/lens-test-zeiss-milvus-planar-t-85mm-f-14-ze-and-sample-image-gallery

Interview in Japanese about this lenses

http://dc.watch.impress.co.jp/docs/news/interview_dcm/20151120_730550.html

As expected:

Zeiss announced that it is discontinuing nine Classic lenses and replacing them with Milvus

• Distagon T* 2,8/15
• Distagon T* 3,5/18
• Distagon T* 2/25
• Distagon T* 2,8/25
• Distagon T* 2/28
• Distagon T* 1,4/35
• Apo Sonnar T* 2/135

Suitable with metabone and gh4?

Why not? Just costly.

The 35mm f2 is very sharp wide open, but once stopped down to f5.6 or f8 you’ll really fall in love with the sharpness. This lens exhibits almost as much sharpness as the Sigma 35mm f1.4 and the Sony 35mm f1.4, but with images right out of the camera it still isn’t totally there.

http://www.thephoblographer.com/2015/09/16/review-zeiss-milvus-35mm-f2-canon-ef/

http://blog.mingthein.com/2015/09/12/a-visit-to-zeiss-and-thoughts-on-the-milvus-line/

http://www.focus-numerique.com/zeiss-milvus-gamme-focales-fixes-25-100-mm-news-7776.html

https://www.flickr.com/photos/carlzeisslenses/sets/72157657267201420