Puggo - Jar Jar's Yoda said:

Of course there will be changes for 3D. George will want things that leap at the viewer to show off the 3D, so things will need to be added that do this. I expect that as they're driving through Mos Eisley, various new creatures will fly by and towards the viewer at random times.

The one I'm dreading is Jedi Rocks in 3D.

Lucas actually has said he doesn't like the "stick things in your face" 3D.

http://www.g4tv.com/videos/53047/star-wars-3d-with-george-lucas-tom-fitzgerald/

Unless these conversions aren't all finished yet, I don't see why they can't release two episodes a year. Movies don't stick around in theaters long enough to drag these out over five years!