What about ROTJ in 3d?
I think the "hype" for 3d is almost gone by now: some years ago it was all about 3d, now it's about 4k (or 8k, or whatever). 3d also got unpopular because glasses were needed until now.
This may be on of the reasons why Disney is holding 3d rereleases back. Sure, TFA will be on 3d too, but it was mostly shot that way, so it costs them nothing to show it in that format, after all.