The kicker is that there are multiple sources in different parts of the game pointing in the same direction in varying stages of completion. This isn’t one guy pranking dataminers, nor is it alpha stuff. It’s actively new content. Once is an outlier. Twice is a coincidence. Thrice is a trend.
At this point, a third spec is the most believable and obvious conclusion. Which is absolutely wild, given what we know about Blizzard. But it actually requires you to stretch more to believe the alternatives.