maybe Bill is holding some footage for the Supreme full-lenght
I'd hope there is, but I doubt he was ever able to film much after Cherry, so it's probably just throw away (not that I wouldn't enjoy that). I don't think he was filming towards a part which left stuff around in the case of Keenan and Shane Cross. I have a feeling it will be like Van Wastell, where all of their good footage they had left ended up in their last part (In Van's case, Naughty).
I know he was recovering for a bit before he relapsed but considering he was coming off heavy treatment, I wonder if he ever got his boardfeel and strength back. No point in releasing stuff that doesn't do his legacy justice.