James Gunn says his biggest challenge with the DC Universe right now is figuring out how to get Batman into it.

The Flash remains one of the most disappointing comic book movies ever, and it's biggest issues echo the worst of DC cinema.

This is what it’s all been leading up to. We’ve engineered, upgraded, and stress-tested our version of Batman’s grappling hook gun—and now it’s time to find out if it really works in the field.