“Bullet Train” is weird and wild and undeniably bloody, taking audiences on a 2-hour journey across Japan. But if you’re here, that probably means you’re wondering what happens at the end of the line.

Popping up then blowing up out of the British underground, no face to the name, masked man bullet tooth is a proper enigma. As releases on Crosstown Rebels, collabs with Capo Lee, and sets everywhere ...