As reported at Patch Cafe, by Dit, the Shaman King manga series will continue after “Shaman King Zero” with “Shaman King Flowers” starting in April 2012.
Shaman King Flowers was originally a oneshot published in the end of the Mentalite fanbook after the publishing of the Shaman King “Kang Zeng Bang” editions. At this time it’s not clear if this new oneshot will continue the story directly from that oneshot or if it will be re-written. Nothing about the plot of this new series has been announced.
“Shaman King Zero” will continue to run monthly in Jump Kai until it’s replaced with “Shaman King Flowers.”