As far as a FT 13 sequel your all forgetting one big hurdle in the way. The studio sold the rights to Jason, That's why they made Jason X to start with to milk the cow one last time. They sold the right for the making of Freddy vs. Jason, think about it, Right now If their was a new FT 13 it would be made by another studio who doesn't care about what Jason been through, So face the fact Friday the 13th is dead.
Think about it Freddy vs. Jason destroyed any hopes of continueing the series, and if Freddy vs Jason vs Micheal came out that series would be ruined to, because New Line is making these Vs. movies and they only own the rights to Nightmare on Elm Street so therefore it is impossible to make another Jason movie, because the rights were sold to new LINE
it is plausable that Jason is normal in the new one. when he gets thrown back to what is presumably earth at the end of 10, he is disolved all bar his mask. that means he could be normal jason with cool mask. plausable. and i dont think halloween holds anything up against Friday the 13th or Nightmare on Elm street, the whole franchise is shit