Yeah...I'm just gonna go ahead and see Seven Psychopaths. If nothing else, it's a rated R comedy with Woody Harrelson, Christopher Walken and boobs. Even if it's kinda bad, there's no way that is a waste of time.
Edit: Wow. I was wrong, there actually is a way to make that premise a waste of time. It wants to be all things to all people, but most importantly it's a genre deconstruction about writer's block. The problem with movies about writer's block is that they're all the same: the main character is a writer (playing the actual screenwriter) runs into the characters he or she is trying to write about, they take over the writer's life and eventually they make the most genre-appropriate version of whatever movie/book/poem they're trying to make. And the climax of the movie is ultimately not whatever happens onscreen, but the real life screenwriter successfully selling yet another iteration of this movie to the studio.
The Muse is a similar example of this problem, but for the love of God don't see it because that movie is terrible.