Ok, I know this is kinda random. This link says something about the release date for the X Japan Returns DVD and the I.V. single, but I can't figure it out ^^"... don't know enough Japanese, and it didn't make much sense when I ran it through a translator.
But, just in case someone might be able to figure it out, here's the link:
http://www.xjapan.ne.jp/info/index.html