As of this article's publication, the episode count for Bleach TYBW part 4 is yet to be announced by the series' production team. However, a safe guess could be made after looking at the remaining ...

enough time has passed to look back on the brilliance of Part 3 of BLEACH: TYBW and why it's the best one yet. During the late 2000s and early 2010s, Bleach's popularity started to slowly decline.