Fujirumors leaked the first image of the Fuji X-T2 grip. You can see a “Boost” function on the grip which raises the frame rate. And as you can see the grip takes 2 batteries. The X-T2 and the new grip will be announced in June/July. It has to be seen if the recent earthquake damage to the Sony Komamoto sensor production plant will affect the announcement and/or shipping date for the new camera.
P.S.: Yes, Sony produces the Fuji designed sensors.