The image below has leaked in japanese board 2ch revealing that CLAMP’s new work, Gate 7, will run in the monthly magazine Jump Square (Shueisha).

Click to enlarge it.

The first chapter one-shot will feature color pages and will be published in the magazine’s December issue, to be released on November 4.

From Wikipedia:

Jump Square (ジャンプスクエア, Janpu Sukuea?, often written as Jump SQ.) is a Japanese monthly shōnen manga magazine with a circulation of over 500,000. Published by Shueisha, the magazine premiered on November 2, 2007 as a replacement for Monthly Shōnen Jump, another manga anthology that Shueisha discontinued in June of that year. The magazine is a part of the Jump line of magazines The manga titles serialized in the magazine are also published in tankōbon volumes under the Jump Comics label.

Thanks to clamp_now community for this news!

CLAMP x Shueisha? This is the first time that CLAMP is published in Shueisha. Also, wasn’t Gate 7 supposed to be a shoujo? And it’ll run in a Shonen magazine? Humm.

No word on the simultaneous release from Dark Horse yet, but maybe an official announcement is about to be made, considering that the picture above was leaked.

Needless to say that I’m veeeeeeeeeery excited about this!!! Next month!!! *_*

Update: According to ANN, the chapter will be a one-shot:

The November issue of Shueisha’s Jump Square magazine is announcing on Monday that the popular manga quartet CLAMP is drawing a one-shot Gate 7 manga in the next issue on November 4. The manga is part of the “Supreme Yomikiri Series” (Supreme One-Shot Series) the regular feature of one-shot manga by famous creators such as Yasuhiro Nightow (Trigun), Akira Toriyama (Dragon Ball), Masakazu Katsura (Video Girl Ai), and Hideaki Sorachi (Gintama). Jump Square launched the “Supreme Yomikiri Series” in its first issue in November of 2007.

If it gets a positive response from the readers, the series might continue in Jump SQ or move to some other magazine?

Update 2: A bigger picture from the announcement can be seen here.