Although there is a new 8mm X-mount Fisheye II, I have no need to upgrade as mine seems perfect. In case anyone wants to see how it looks on a Fuji....
Note: the new 12mm f/2 is a mirrorless lens, about the same size. The new 10mm is a DSLR lens designed to fit Fuji which means it is much bigger and heavier, about 2 1/2 times heavier and does not accept filters

8mm - maybe they will have a big sale to get rid of the old fisheye stock. If so grab one.
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Fuji Silver XE1 w/14, 35, 18-55, 55-200, Rokinon 8mm Fisheye & Tamron 90mm f/2.8 Macro