So thanks new datamined text we know for sure:
Alliance lead by Turalyon, Muradin and Danath fucking Trollbane!
High Perch is ours! The Horde army is coming for you, Turalyon.
Yes... I'm counting on itWe've captured High Perch. Muradin! I can see your big nose from up here!
And I can smell yer arse from down here! Bring it on, orc!You dare invade Arathi? With a TROLL as your commander? You've made a terrible mistake.
Danath Trollbane... you an' I got a bone to pick! I'll be seein' ya out on the battlefield...
Horde leaders are Etrigg, Rokhan and Liadrin.
Now, bring in the demolishers! Take down that gate! This battle is as good as over!
I've won and lost thousands more battles than you've ever seen, Eitrigg. And this battle is far from lost. Lightforged, attack!Send in de demolishers! Dat dwarf can't hide behind his gate forever!
Bring it on, Rokhan! I've been waiting for you. Dark Irons, now!What's this... Horde invaders, with a paladin in command? What has this world come to?
You've been away for too long, Turalyon. The world's moved on without you.
Lady Liadrin! Welcome to Arathi. I trust you're here to surrender?
Hah! Think again, old man. We're here to take Stromgarde back.
(I assuming its Danath - Liadrin)
Also text implies what Dark Iron Dwarves ALREADY in Alliance at the start of BFA.
So guys who do you think have move chances to win?
Team Turalyon/Muradin/Danath or Etrigg/Rokhan/Liadrin?
I think its pretty oblivious Blue team will crash Red team with ease.