Found this article that said George Lucas considered him for the part but thought him to old. Which admittedly was true but just think of how Starwars might have changed.
http://www.tvsquad.com/2008/12/05/james-martsers-joins-star-wars-but-not-as-anakin-skywalker/
Makes sense from way back i remember that G.L. daughters were big Whedon fans and he and his family toured the set of Buffy.
oh well but the article says he is going to voice a character on the clone wars. and who knows maybe a role in upcoming series. that end part was all me not the article. just think it would be cool to see him as a bounty hunter or a Sith kicking butt. or a bounty hunting Sith kicking butt.