| This answer is subject to change.|
The topic of this question is tentative in nature and may possibly change in the future.
Though this is something one would very unlikely survive, at least one of the film's crew stated that Wolf Boss "just fell" when another asked if he was dead. But Wolf Boss later appears very much alive in the video game following the events of the film.
Since it's unknown who from the crew to believe and whether they were serious or not, as well as whether or not the video game is canon, Wolf Boss' supposed death seems left open to interpretation.