8. A New Generation of Heroes
Each Evil Dead film has a new supporting cast, usually because Ash tends to be the last man standing by the time the credits roll. As tempting as it may be to check up on Sheila and the rest of the kingdom, it's best to leave them be. We know from Evil Dead 2 that Ash saved them, and locked up the evil until the present day. If the movie returns to that time period to show that Ash didn't save the world, the ending of Army of Darkness and its buildup will lose much of its power. We need new characters to see chopped up. Characters who don't know or care about Ash. They're probably dealing with the Deadites in their own way, and figure that Ash has no idea what he's talking about, or doing. That'll give Ash a reason to show off.
7. New Deadites
The Evil Dead series has always introduced new monsters in each film. In the first film, you had the standard possessed humans. In the second, you had that dragon thing the old woman in the basement turned into, not to mention that crazy demon who nearly tore the cabin apart in the finale. In the third, you had an army of skeletons a'la Jason and the Argonauts. Let's go further this time. This time, let's get crazier. New monsters, new demons to fight. Let's see some creative new monsters that walk the thin line between demonic and bloody hilarious.