A slightly different minecraft scenario

Inspired by "A slightly different minecraft trailer" by Neytirix on youtube (watch it, its good). Centurys of peace have weakened the kingdoms of the overworld, and the Archdemon herobrine has awoken. The fate of mankind hangs in the balance. Do you play as a human, and fight to save the overworld, or as one of the nether hordes, or the archdemon himself, seeking to destroy it?