I think if we see anything further from S.K.I.N., it will probably be something along the lines of what we've seen from L'arc en Ciel in recent years -- the whole one year on, one year off bit since everyone has other things they want to be involved with as well.
But, I'm not holding my breath waiting for an album. Or a DVD, or anything else. Miyavi hasn't announced any big plans for 2009, but Gackt has a huge tour coming up, and Yoshiki has several concerts with X, and I think IF anything happens next year, it will be late in the year.