In a few years, the DC Extended Universe will undergo a complete overhaul, with new creative guidance once again trying to build a cinematic empire out of famous comic book characters. “The Flash” is one of the last offerings from the old guard, and it’s really trying to do something special with its run time, exploring not only the DCEU of the last decade, but the world of comic book entertainment, looking to boost the adventures of Barry Allen with an expensive and expansive epic that often tries to be more than just a film about The Flash. It’s a major undertaking from director Andy Muschietti (“It”) and screenwriter Christina Hodson (“Birds of Prey”), as the story plays with multiple timelines, characters, and settings, working to provide a massive viewing experience for those who still remain invested in Zack Snyder’s DCEU vision. And there’s fun for others, with “The Flash” going everywhere with its story, conjuring a defined energy that’s often exhausting to keep up with, and it periodically overwhelms the helmer, who’s hanging on to control of the feature by his fingertips at times. Read the rest at Blu-ray.com