After watching some videos of Nathan P. Butler’s From the Star Wars Home Video Library (great show, by the way).
I noticed that the Star Wars: Special Editions get new incarnations every seven years (1997, 2004, 2011), and they always have new formats.

1997 theatrically, on VHS and LaserDisc
2004 on DVD
2011 on Blu-ray
2018 on 4K Ultra HD?

If Disney didn’t buy Lucasfilm, George Lucas will probably continue the seven-year cycle and tweak the first six films again and they will have 4K releases.
And maybe this is a sign that this is the year that the first six Star Wars films will come out in 4K Ultra HD, and I’m not sure if there will be more alterations under the new rule of Disney. (Most likely not, since the 2011 versions are canon according to Disney).
However, what is sure is that The Last Jedi will be the one to come out in 4K this year.
It is not yet confirmed if The Force Awakens or Rogue One will get 4K re-releases this year.
And now, it’s very possible considering Fox bought Disney, meaning that Star Wars is now under Disney, and the saga is now 100% Disney.

The only reason why we don’t have the unaltered versions of the Original Trilogy from Disney yet is because Kathleen Kennedy is close friends with George Lucas, who specifically told her to never re-release the unaltered versions.
Which Kathleen did out of respect for George, not just as the original creator of Star Wars, but also as a close friend.
She wouldn’t want to betray Lucas the same way Anakin betrayed Obi-Wan.
But Disney may, without any regards for the friendship of the two, force Kathleen Kennedy to put out the original unaltered trilogy since it will surely print money for Disney.
And with the cycle going on, now might be the year to do it.

If the 4K discs do come out this year, I hope the 4K discs get ripped so we can make an even better source for v3.0.
And I hope that Disney will force Lucasfilm to re-release the original unaltered trilogy this time.