The next issue of Weekly Shonen Magazine, to be released on March 08, will come with a postcard of HiGH&LOW drawn by CLAMP as an appendix.
This will be the first official art by CLAMP for HiGH&LOW.
The same issue is also going to announce the issue in which the serialization shall start.
Source: CLAMP-NET.COM.
This looks like this will be getting a lot of attention.