If you play ANB you are disqualified from the game and, if you are in a tournament, the tournament. They figured this way, no one would ever have to worry about ANB again.
But in reality, I believe this is the current errata:
A New Beginning - If making a rescue attempt, remove this card from the game to shuffle all cards in play, set aside areas, and hands. If no Heroes remain in battle, end the battle, all players draw 8, and you begin a new turn.
