Even though Shaman King has two manga series: the original series ended in 2004 with 32 volumes and the Kanzen-Ban started in 2009 and ended with 27 volumes*, Hiroyuki Takei announces in the 4th volume of Shueisha's Jump X magazine that they are publishing the zero story about Yoh Asakura. This story is slated for November 10 and that this story will lead up to a "big" project next spring.
The story will have 44 pages and a large poster.
*(Have to check Kanzen-Ban)
Thanks you for reading this report. Look forward to an all new Shaman King story!
Team W.I.K.I Nation, Team Beelzebub, and others
*Thanks to ShadowKnight508 who gave me this tip.