What comes after '¡Uno!,' '¡Dos!' and '¡Tre!?' '¡Quatro!,' of course, although Green Day won't be following their new trilogy of albums with a fourth record. '¡Quatro!' announced today, will not be another album, but rather a documentary offering a behind-the-scenes look into the making-of '¡Uno!,' '¡Dos!' and '¡Tre!'