“This Is the End” features a huge collection of youthful Hollywood players, but the apocalyptic comedy – written and directed by Seth Rogen and Evan Goldberg – isn’t nearly as funny as the talent would lead one to believe.  Along with co-writing and directing, Rogen spends a good deal of time on screen, portraying a fictionalized version of himself. In fact, the most interesting thing about the movie is that all the actors are offering absurdist versions of their public personas.