Questions. We answer questions.
Q4TQ (or maybe more a PSA?): Saw this on MMOChamp:
"Kil'jaeden and Archimonde are back, but not as bosses."
So that pretty much kills the "all world, all dimensions are open" / only one Burning Legion across multiple planes of reality idea?
Considering we see Grommash kill Mannoroth in the cinematic for Warlords of Draenor which is set 35 years in the past, if there was only one Burning Legion across all planes of reality, that would mean that our Grom couldn't kill Mannorth ten years ago, since he would already be dead.
But no, since it's 35 years ago, both Kil'jaeden and Archimonde could make appearances, since Kil'jaeden isn't dead (he gets banished during his fight at the Sunwell) and Archimonde only died ten years ago. It's the double-death of Mannoroth that proves there's more than one Legion.