Is it just me or are you still worried about Ben Affleck as Batman? When I first hear Batman was going to follow the dark knight returns story line, my first thought was, "I hope they cast Michael Keaton." However we will never see this come into reality. So the next best thing is to photoshop the true Dark Knight with the updated look of the movie.
If you are thinking I wish they made this choice, I agree with you. After all Keaton is Batman and in the dark knight returns we see an older Batman return to the cape and cowl. I'm sure many Batman fans would have loved to see the seasoned actor back in the suit.