The artist will be moving to a new, unannounced monthly series.
Source: Bachalo's Blog
Chris Bachalo announced today on his blog that he will be leaving Wolverine and the X-Men as of issue #16. He stated that he'd be moving onto a new monthly, although he couldn't comment publicly on what it was. He also added that he'd be working on a "filler" project that would help fill the gap between his last issue of Wolverine and the X-Men and the new project.