Matthew;131439
Here's another one.
The Ghostbusters catch a ghost which unbeknown to them is actually the grim reaper.
http://en.wikipedia.org/wiki/Death_(personification)
Due to the fact that the grim reaper is now in their ecto containment facility death itself has ground to a halt and because of this nobody is dying.
Sick people who were on the verge of death are somehow beating the odds. Suicide jumpers are mysteriously surviving falls from tower blocks, people are walking away from major car accidents, prisoners are living through lethal injections and electricutions, it's as if everyones become invincible and immune to death.
People don't understand what is going on and are confused but are delighted at this mysterious phenoma because it means they will never die. On the other hand the government realises that if nobody is dying then the planet will become overpopulated extremely quickly.
The Ghostbusters peice together what is happening and that the grim reaper is actually inside the containment unit.
The media hear about it and everyone wants the ghostbusters to keep the grim reaper inside where as the government is forcing them to let the grim reaper out. The ghostbusters know that as soon as they let out the grim reaper he will catch up on all of the work he has missed in the time he has been locked away and many people which would have died will be die.
The Ghostbusters decide to let him out after doing a deal with him which he agrees to. The grim reaper agrees that he will no longer take the lives of the young or of people who have had unfortunate accidents.
I know it sounds a little morbid for a PG rated comedy but I think if done right it could be funny and it could suit a Ghostbusters movie.
This general plot was essentially already used in an episode of Family Guy.
And the part about the Grim Reaper agreeing to not take the lives of the young or those who have had accidents… I don't like that, cuz you're basically having the Ghostbusters play God there, and control how life is supposed to play out for each individual person.