DominicCobb said:

But why now? Surely in anticipation for TFA. But are they really going to squeeze more milk from the TFA teat in a few months? If they were going to re-release the old masters before the "new" ones came out, wouldn't they have done it a year or two ago so as to not oversaturate the market with too many re-releases in a short amount of time?

It's not really market saturation so much because no matter what they put out there, it will sell. This could be a great time for them to squeeze what little life is left in the 2004 masters before unveiling a shiny, new 4K transfer in some form or another. Then if they don't put that new transfer out on digital, they will continue to make money off of a decade-old transfer until any and all displays are at least 4K.