Bingowings said:
It has been speculated that the Falcon isn't flying towards isn't a galaxy (as all of the story takes place inside the Star Wars galaxy and travel between galaxies would require technology beyond even that shown in the saga, not something that concerns me much as I don't feel Star Wars is science fiction).

It may be an accretion disks around a young star (something that doesn't really match the current image or your lovely new one both of which look like spiral galaxies).

It might be nice to experiment with images of what accretion disks might look like (some look very pretty and there are a lot out there if you do a search) :

It has never really bothered me that perhaps the rebel fleet was hiding outside of the galaxy at the end of ESB. I think the final shots could use a little punching up, but nothing too drastic.