Bleach's popularity decreased because of the Fullbring arc and does not seem to be rebounding. It's to old and still sells to well, even in decline, to bother canceling. Kubo has already announced this is the final arc, I'm sure he will be given a reasonable time to conclude the story. As long as he does not plan on another four year arc I doubt Bleach will be canceled.
To soon to speculate on what will be canceled, considering that three new series started over the last month. The new series do not even begin to rank until mid-July. They probably will not add any more new series until late July or early August, at the earliest.