It will end with KOF XIV where after you beat Rugal for the 5th time you hear a heart begin to beat, and an old man awakens from a hospital bed after nearly 25 years of being in a coma. SNK was all a dream, and Rugal was actually his psychie forcing him to stay alive, while the KOF team was his will to accept death trying to stop it. After this final battle with a roster that makes no damn sense (Team Samsho, Team Twinkle Star), our hero finally accepts his death and flatlines. SNK is dead, SNKP was merely his health taking a dramatic plunge and his legs getting infected so they needed to be cut off.
A Dr. enters the room (Dr. Bogard) and runs to the flatlining man, remembering his family has signed a DNR (at his suggestion even) he shakes him asking "Are you ok!?", but he has gone. He checks one more time "Hey c'mon c'mon....live!", but its no use. Knowing he can't jump him he lays the sheet over the man's face. As Dr. Bogard leaves the room he sees the sunset come into the window, beautiful shades of purple and orange fill the hospital room, blinding the Doctor. He squints, and quietly murmurs "bust on my friend" as he goes to get the coroner.
The end.