You may or may not know this—depending on how much of the advertising blitz for “The Hangover Part 2” you’ve absorbed in recent days—but it seems that the Wolfpack is in fact back. The most common cry across the landscape of the internet has been that the sequel looks exactly like the first film. On a recent episode of “Ellen”—yes, I watch “Ellen” from time to time—Bradley Cooper confirmed as much, and he is entirely correct. Director Todd Phillips and company employ the same “lost night” story-telling technique that worked so well in the original, and “The Hangover 2” is really little more than a rehash of “The Hangover”. Which means that it is still pretty damn funny.