Will this be a BD25 or BD50?
The current plan is to do the initial release as a 30-40 GB mkv, so a bluray version will be BD50.
Guess you’re using H264 and not H265 which is the vastly better codec including halving the filesize. I’d rather wait for the BD anyway.
H265 is better at reducing file size, but H264 is overall considered a better codec for maintaining image quality.