I love how my edit got cut off. -_-"
I actually had posted the link to that article, the same link you posted, Riolu, and my two cents on her as a VA. I personally hope she isn't doing Aqua. To me, Aqua needs a more mature, sensitive, yet strong voice. That's her character. Unless Willa can pull something out of her hat or wherever, and she is indeed doing Aqua, I dunno how I'll feel.
As for those figures, now it doesn't surprise me that they'd get Hamill to do a voice. I didn't know Square had anything to do with Arkham. Now that I do, and considering how Square likes to use the same VAs..... it all fits into place. My money is on him voicing Eraqus. That'd be cool. The ultimate hero of the Light Side of the Force playing the Master of the Light Side of the Keyblade Wielders? Fitting. Also, it'd be pretty awesome if he would go up against the Spock-infused Master Xehanort. It may all sound highly illogical, but the Force is with me! =3
(BTW, if NO ONE can tell yet, I'm in a permanent state of bliss after hearing this piece of news.)