It’s not impossible. However, it’s likely that it’ll be a temporary addition, since that’s usually the case for most of the seasonal themes thus far. On the other hand, if the developers had stated that it would be a permanent addition, like the followers rework, then that’d be a different story.
All in all, we won’t know for sure, until either much later, when we see the contents of the next ptr update, or we get a blue response pertaining to the matter.