Měi bù chāojí yīngxióng diànyǐng dōu xūyào yí ge dàfǎnpài.
Every superhero movie needs a big bad.
Tips
usage
Intensified form of 反派 (villain) with 大 marking the top antagonist. Largely synonymous with 最终BOSS but reads as more literary / drama-review than gamer jargon.
