Wouldn't be surprised to see Patrice Bergeron again. That was a pretty bitter pill to swallow the way his season and the Bruins season ended. From reading his autobiography, believe Jean Béliveau intended to retire at the end of 1969-70. But the way that season ended with the Habs missing the playoffs for the first time in his career and on the last night of the season influenced him to come back for one more year (that turned out pretty good).
Maybe he could come back later in the season, the way Justin Williams did, saving a lot of wear and tear on the body. He already has his cup and s/b a first ballot hall of famer and maybe physically though he's done, so we'll see.