I can see three alternatives:
1. Patrick Stewart. 'Nuff Said.
2. Let George Lazenby do it (if he is willing), in deference to Michael Sloan's original intent and since I believe he will be involved with the film.
3. The alternative that I think is most interesting -- Develop the film with a "passing the torch to a new Equalizer" theme as mentioned earlier, and cast Edward Woodward's son, Peter Woodward, in the role. that would be cool, and if you have seen Peter Woodward work (Galen on Babylon 5, among other roles), you know that his father's style is quite visible in his style.
Great choices! And yes Peter Woodward has his dad's style in spades.
