Scream 4's Possible Stars: Cast 'Em or Chuck 'Em?

I must admit, I'm actually quite excited for Scream 4, thanks in large part to the original director and stars like Neve Campbell and Courteney Cox already signing on. But as happy as I am about those old familiar faces, it's inevitable that there will be some new blood in the movie's cast. Today I've heard that Ashley Greene, Lake Bell, Hayden Panettiere and Rory Culkin are all in talks to appear. Since nothing is set in stone yet, I thought it would be fun to review each actor and the character they're up for (P.S.: lots of fun plot details are revealed in each!)!