I always thought that it was just another galaxy that they were looking at where ever the rebel fleet was at that point in the movie, nothing more. It has nothing to do with the plot IMO, and it doesn't ruin the movie at all. It's just something to look at, and thats how I have always viewed it. It's been part of starwars cannon since 1980, so deal with it folks, Ady is not going to change it.