Let’s begin this review on the bluntest note possible: Pacific Rim is the summer’s best blockbuster by several leagues. That may read as grotesquely biased coming from someone who grew up on Ultraman, Ray Harryhausen, and Toho films and discovered mecha anime titles in his college years; it probably doesn’t help my case that Guillermo del Toro happens to be one of my favorite contemporary filmmakers, either. But if my loyalty to del Toro and my passion for the kaiju films he has modeled so much of Pacific Rim after give me a clear dog in the seasonal fight for popcorn supremacy, my sentiment about his latest film remains as…