As some people may already now, there is a new patch launching for Diablo 3 soon. Reading through patch notes I came upon a change of an item for one of the classes (specifically monk, but question covers all).
Blizzard made one of the items exceptionally stronger:
The Fist of Az'Turrasq
Exploding Palm's on-death explosion bonus damage has been increased from 75-100% to 250-300%
The question is - I already own one Fist of Az'Turrasq. What happens to this item after patch goes live? Is it rerolled? Or do I have to find another after the patch kicks in, as the one I have doesn't have the stats changed?
Edit: As I kept on reading, I realized one can use Kanai's cube to reroll stats of a legendary item (which The Fist actually is), but will the reroll take in account new stats?
Edit 2: As no-one can actually predict the future and how Blizzard solves this issue, I would like to know how this was dealt with in the past. Since asking about unreleased content is considered offtopic, hence this edit.