I would say this pretty much kills that idea.
Only one round for "Freddy Vs. Jason"
It still sounds like a top flick, but according to Robert Englund rumours about two different endings for “Freddy vs. Jason” never eventuated. "The so-called Rob Bottin script, when we were trying to do this movie by summer 2000, ... had two endings," Englund tells SciFi Wire. "Jason [Ken Kirzinger] wins one. Freddy wins one." The idea, Englund said, was to switch the last reel for different screenings. "So no matter which octoplex ... you're at, you can switch the thing, so you never know what ending it is," he said. But, he added, "that gimmick was decided against. I kind of like it, actually. I thought it was a great kind of William Castle, you know, kind of concept." Instead, Englund said, "We just shot one ending. But they were tweaking the final reel a lot. Building and building and building. ... We have many encounters in the movie. ... One of the sound editors ... said it reminded him of Popeye vs. Bluto. ... They're not as much scary as they are Freddy vs. Jason, as opposed to Jason vs. the kids and Freddy vs. the kids. That's the real horror."