We've seen Illidan sacrifice his entire team of Moon Guard to save Black Rook Hold.
We've heard Illidan bitch about how little we've sacrificed.
We've learned by now that much like Sargeras, Illidan is going to, and will sacrifice everything to destroy his foe.
Yep, that's how Blizzard has been retelling Illidan's story. He's not the Betrayer, he's the Sacrifice-er
... So who's going to stop Illidan when he attempts to sacrifice you, me, and the other brave defenders of Azeroth who have sacrificed so little..? When Sargeras is too strong for him, and he needs our power...
Who is going to stop Illidan when he betrays us?
Bingo. Us.
Thoughts? This just seems a little too foreshadow-y to me.