Harmy said:

I think Ady already said that he would be using the Blus. I guess he could even re-render stuff for ESB:R by simply using the Blu-Ray footage seeing as it will be the same basic transfer - although as it seems there will be more colour changes (screw-ups) he'd have to redo the colour correction.

I don't think the minor bitrate upgrade after being downgraded to 720p would be worth starting over on the color correction. And have we seen proof that they haven't just done their own color correction on the 2004 base?