I don't really like to say 'never'. I didn't think I would ever get a Barnabas Collins figure and I did, so..... But here are some I would love that are more unlikely:
Supernatural -Dean and Sam Winchester, complete with weapons, the colt, and their father's hunting book.
V for Vendetta - V and Evey. There's a very small chance a V might one day be made, I suppose...but it's only a small chance and I would love both of them.
The Phantom of the Opera - Gerard Butler and Emmy Rossum versions, preferably from "The Point of No Return". They would be beautiful, but this doesn't really fit in with what most figure companies do.
The League of Extraordinary Gentlemen + Sherlock Holmes - Based on the comics, not the films. I included Holmes because he's mentioned in the comics and I want a Holmes.
Fables - The comics. Snow White and Bigby Wolf.
American McGee's Alice & the Cheshire Cat - Would be amazing in premium format or 12 inch (though I would prefer PF because of the larger cat)..... Unlikely, but a girl can dream.
Beetlejuice & Lydia - Just the pair. Movie versions, though I actually love the cartoon much more than the movie.
If I ever see just two licenses from this list get made.....I would be ecstastic.
Of course, my ultimate desire would have to be a Barnabas Collins cinemaquette or 1:1 scale bust. But since Majestic has the license and they don't seem to be doing anything other than 12 inch, that's highly unlikely.