No One Will Hear Your Cries

• WWizards of the Coast2017-06-13
  Official Ruling
  All of the other creatures are sacrificed simultaneously after the opposing team chooses which creatures to keep.
• WWizards of the Coast2017-06-13
  Official Ruling
  If an opponent controls no creatures, that player isn’t affected by this scheme.
• WWizards of the Coast2017-06-13
  Official Ruling
  In a Supervillain Rumble game, first the next player in turn order chooses a creature, then each other opponent in turn order does the same. Then the other creatures are sacrificed simultaneously.

Rulings via Scryfall