Fujifilm recently has filed two lens patents for X-mount APS-C mirrorless cameras. They are Fujifilm XF 300mm f/4 Lens and Fujifilm XF 500mm f/5.6 Lens.
Patent
Patent of Fujifilm GFX XΩ Modular Medium Format Mirrorless Camera
The Fujifilm GFX XΩ modular medium format camera concept was first shown up in February, 2019. Now a Chinese website has posted the patent images of this GFX XΩ modular medium format camera.