Ok, So I'm thinking Nicholas Brendon best known for his role as Xander Harris in the TV series of Buffy the Vampire Slayer.
Rumors of the Evil Dead remake have already stirred around Brendon actually playing the Ash character due not only his milar Bruce Campbell appearance but also his amazing acting style resemblance to the Chinned one.
Personally I'd love to see Brendon play the spawn of Ash LOL.
So here's my story line.
The Book of the Dead is again unleashed upon the world and Brendon, known as Ash, shows up to fight the Evil.
3/4 of the movie we think Brendon has been recasted as the Ash character then only to have Bruce show up for the climactic battle revealing (to the audience) that Brendan's Ash was really Jr.
What do you think?
I smell oscar written all over that premise!

I like that. I like it alot. Maybe he could be known mainly as Ashley though, mixed with a few Ashes. We'd still have the same thought, it would just be a little less obvious. Very good idea man. Write it, and pitch it.