Indeed, he was recently asked this question in a press conference, and he did not dismiss the possibility of returning to play before the end of this campaign.
In any case, this will be a situation to monitor, but it's big to see that he's already in full gear.
Obviously, it won't change much for the Canadiens in the overall standings if Kirby can play 2-3 games at the end of the season, but for him and his morale, it would be huge! (even for the fans)