Fanboys, rejoice! Guillermo del Toro's first movie since "Hellboy II" is here, and it has giant robots fighting also-gigantic monsters. "Pacific Rim" has decidedly split critics, but if you're heading to theaters this weekend, these are the Five Reasons you should check it out. Read on after the jump! It Delivers Its Promises So you saw the trailers. They spelled it out: robots fighting monsters. That's a simple and badass enough of a concept to get you interested. Spread that out over two hours, and we're set. Well, "Pacific Rim" does...