I've heard there was an alternate endings to KING KONG VS GODZILLA- one where Kong wins, one where Godzilla wins.
As it is- I can't even remember who wins last time I saw it. And I got this movie on dvd.
This was a rumor mainly put about by FAMOUS MONSTERS magazine back in the day; as it is, Toho themselves have acknowledged that there was only one ending filmed. Kong and Godzilla fall into the sea, Godzilla is buried by an earthquake and Kong swims home.