Unfortunately, that won't be happening.
http://screencrush.com/rumor-buster-disney-star-wars-original-releases-dvd/
Another barrier that the author doesn't even mention is that the physical film for the original theatrical versions isn't even in tact. They had to cut it up when they made the special additions. Even if they wanted to release it, it would cost hundreds of millions to remaster and assemble all of it, which is cost prohibitive as most fans aren't nearly as hardcore as we are and are fine with the slanderous 'Greedo shot' first version.