It sucks that she's disappearing for a while, but hopefully it's for the better, and that it's not for too long.
I know this sounds crazy and I might be the only one in favor of it, but I'd like to see her make an album of English versions of her classic hits like "First Love" and "Final Distance".
Of course, I'd prefer she do this after she recharges rather than attempt to do it while burnt out.
More realistically, I'd love to see her record label give her Japanese works official American releases so I can buy them at American prices! I see her stuff all the time at Kinokuniya but simply don't have the stomach to pull the trigger on them. Make it happen, EMI!