I have to backtrack on something I said earlier. Checking the FCC regs, images are NOT required. I thought they were.
I apologize for the error.
That said, based upon information posted on the FCC website, such a radical redesign as the removal of the notch would entail would require Google to recertify the device.
That doesn't answer the actual question, but as noted already the image requirement was an error on my part. The renders and other images did not come from the FCC and therefore the leaks cannot be from the FCC.