do you think this is a good theory on graham?

from what we saw in heart is a lonely hunter,in fairytale land, regina ripped his heart out and he was still alive and in storybrooke, emma proved to graham that he still had a beating heart. what i suddenly thought of is i wonder if the heart regina squeezed to dust only caused him to go into a special kind of coma where it makes the person out to be dead but really just in like i said a coma and graham is still alive. i wonder if in the very end of the season finale, emma visits the grave that graham was buried and finds that its empty, and she hears someone call her name and she runs to see who it is and low and behold its graham looking very dirty and weak. granted it sounds like a copy of when emma found kathryn but i just thought it would've made a good ending to the season. my theory may not happen but i just thought it would be cool if it did.