They only ever showed a few socons of the TPM digital Yoda, and the purpose was for the animators to get back into practice between movies. Similarly they recreated yoda from ESB as a proof of concept before starting on AOTC.

They never did [officially] say IIRC that they would release the film with Yoda's scenes redone, But i guess I could see it happening, I guess the odds of it are about 50/50.

The most likely outcome is that the BD releases will be as equally disappointing as the DVD releases. We all know it....