I agree the crossover worked so well I wouldn't see it happen with Leatherface or Michael Myers, it wouldn't fit. But Jason and Freddy had good chemistry and Ash might have been a good fit in too.Freddy vs. Jason (2003)
I'm still so glad this movie exists. One of my favourite horror crossovers ever. Although I would have loved to have seen the film sequel with Ash Williams included too. I believe they did some comics at least.