Yea the originals aren't going to come out until the 3D theatrical releases of the special editions. Those are slated for 2015, I think, so 2017 sound about right.

Or it could go like this:

2013 - 3D theatrical releases of AOTC and ROTS

2014 - 3D blu-rays of prequels

2015 - 3D theatrical release of OT special editions

2016 - 3D blu-rays of OT special editions

2017 - blu-rays of UOT

Gotta stretch everything out and keep that cash coming in while teasing the faint hope of the end prize.