User blog comment:Tutles/What?/@comment-3290324-20120310214434/@comment-3290324-20120310224151

An arc for Tite Kubo is about 5 years, and he said that his arc was going to be a long arc. So a long arc + Tite Kubo = years and years of Bleach.

Naruto seems to be in its last arc, but I wouldn't say that's set in stone yet.