Dark Horse has been publishing Star Wars comic books for well over 20 years, but their partnership with LucasFilm will more than likely be coming to an end very soon. As you should already know, Disney owns Marvel, so common sense says that they will soon be handling the lucrative job of publishing comic books based on the iconic film franchise. As of right now though, Dark Horse holds the license, and while the following statement (released via IGN Movies) from Mike Richardson seems fairly optimistic, it's hard to imagine "the near future" lasting much longer. As the site points out, "when Disney bought Marvel, the Disney/Pixar properties that had comics being published by Boom! Studios eventually reverted to Marvel" and so it seems likely that the same will happen again here.
"Dark Horse and LucasFilm have a strong partnership which spans over 20 years, and has produced multiple characters and story lines which are now part of the Star Wars lore. Star Wars will be with us for the near future. Obviously, this deal changes the landscape, so we'll all have to see what it means for the future."