What destiny will the Kitty have?

Here it is, my neighbor moved out and left behind his Cat. Its been a few months now and the poor guy is just laying out there with no roof and care. Some neighbors and I feed him but lately I have found it has been left for me to do this. He isn’t looking real sharp, in the last couple of weeks he got banged up and barley lifts his head up. I would love for him to find a good home but just the thought of calling the Humane Society and them not being able to find a place….. would they send him to kitty heaven?? its a catch 22 at this point if he stays around he has no care if he goes then what? Suggestions are much appreciated please.