Secret Tauren Lore??? (Spoilers)

[Darknessvamp]

All I can predict is that the reveal will be severely underwhelming. That is unless it's Cairne revealing he's become an Ordos like god somehow.

[Powerogue]

Cairne: You must know the deeply hidden secret of our people....
Baine: What is it, father?
Cairne: We are descended....from cows.
Baine: What a load of bull! I came all the way out here for this?

[Kathranis]

Hard to say - the Tauren have some pretty significant and mostly unexplored connections to the Old Gods, so perhaps there's something to explore there? Perhaps the Earthmother actually exists as one of these nebulous "First Ones" in the Shadowlands, as well?

Well, some of Baine's dialogue in BFA implies pretty heavily that the Earthmother is literally Azeroth herself, as in the World Soul. And there's definitely some unexplored Old God stuff. There's also Ebonhorn, so maybe it'll actually be building towards new Dragon Isles lore rather than something related directly to the Shadowlands.

There's also An'she and Mu'sha, which aren't very well explored, so maybe it'll tie into Elune / Night Warrior / Light vs Void stuff?

[Raetary]

There's also An'she and Mu'sha, which aren't very well explored, so maybe it'll tie into Elune / Night Warrior / Light vs Void stuff?

Mu'sha IS Elune.

An'she however needs more exploration.

[Aucald]

Well, some of Baine's dialogue in BFA implies pretty heavily that the Earthmother is literally Azeroth herself, as in the World Soul. And there's definitely some unexplored Old God stuff. There's also Ebonhorn, so maybe it'll actually be building towards new Dragon Isles lore rather than something related directly to the Shadowlands.

There's also An'she and Mu'sha, which aren't very well explored, so maybe it'll tie into Elune / Night Warrior / Light vs Void stuff?

That's what I've always thought, that the Earthmother was kind of the analog to the "Great Spirit" incarnation of the land itself, which would be the World Soul in the Warcraft universe's mythology. I don't think Ebonhorn really has any major links to the Tauren's backstory outside of his role with Huln and the Highmountain Tauren, though.

Mu'sha is basically the Taur-ahe title for Elune, though An'she is a bit more nebulous since the Sunwalkers' reverence for it does seem to bestow them with the Light-based powers, so it is possible An'she is indeed an entity of some kind.