While the character is the thing that most people associate with the movies, along with chainsaw hands and boomsticks, the actor who played Ash Williams says the character will not be showing up in the remake.
According to various reports, as well as his Twitter feed, Bruce Campbell will have a cameo, the entire cast of the remake would be different than the original movies.
While Ash is the face of The Evil Dead, the new script, written by Fede Alvarez and rewritten by Diablo Cody, is a “re-telling” according to Campbell’s tweets. He says “all bets are off & all involved love the new approach.”
Without seeing a script, I can’t tell you what happens in the movie. The Necronomicon has to be in it though, otherwise it just wouldn’t be an Evil Dead movie would it? This will be a difficult remake if the creators want it to live up to the cult favorites, but perhaps they want it to be seen as a new story that’s just shares a name.