I find it very strange that 2CH, Comic Natalie, and Manga-News all missed news this big, that news this big did not break until raws were available. For gods sake we knew Star Children and Pakki were ending weeks in advance. I find it inconceivable that the end of Claymore, a far more prominent series, is a surprise. Something seems amiss.
What Negative Syndicate posted a few days ago makes the most sense: the first part of Claymore has ended and a sequel is coming soon. Because the plot of Claymore has been resolved, the sequel will have a new name and start over at chapter 1, similar to GUNM resuming as GUNM: Last Order. The lack of announcement could mean there will be no break in serialization, or that serialization will resume in another magazine. If the latter proves true the probable destination is Ultra Jump, not out until the 19th. If it is moving to Ultra Jump, they would be responsible for the announcement, and any news would be delayed until the next issue is out. That is merely speculation on my part, but would explain why neither SQ nor Yagi have made any announcements regarding Claymore's future.