I agree with you actually, though I thought his face looked pretty cool in a comic sort of way. I would have had him getting out of his bed, ripping his bandages off and walking out the door, having someone attempt to stop him and then have him flip his coin *cue credits while coin in air*
Could have been a nice lead in to the next movie, while allowing the director to switch between the batman/joker scene and the hospital. The only problem being that joker couldn't blow it up?