If you pre-ordered the Fujinon XF 8-16mmF2.8 and need a filter holders for it, you can get the Fotodiox WonderPana Filter Holder for Fujifilm XF 8-16mmF2.8 at AmazonUS, BHphoto and Adorama.
We already reported back in July about the XF8-16mm compatible LEE filters (see image below). In that case, it looks like the Lee Filter W150.
The Fujinon XF 8-16mmF2.8 itself will ship at the end of November.
Fujinon XF 8-16mm F2.8: BHphoto, Adorama, AmazonUS, Focuscamera