Those who are immortal will never die. It ends in a draw, just as Freddy Vs. Jason did. "Oh, Jason won! YEA....... aww, fuck, Freddy just winked at us, niggah! He ain't dead!"
Jason Vs. Michael Myers would be the best one though cause neither one talks, right? So Jason would stab Michael and a black screen with text would be like "OWW, MY KIDNEY!" like a silent film!
Or Chucky Vs. Leprechaun!
Or Puppet Master Vs. Demonic Toy-oh wait they actually did make that movie! Old ass movie too...