The roots of this go back to 2010, when several non-superhero films that were nonetheless based on comic books or graphic novels -- "Kick-Ass," "The Losers" and "Scott Pilgrim vs. the World" -- failed to light up the box office. "Kick-Ass" did OK relative to its cost, but "The Losers" sank quickly from sight, and "Scott Pilgrim" was a bomb of epic proportions, earning just $30 million despite a massive promotional push that included a literal takeover of last year's Comic-Con. If we look back even further, 2009's "Watchmen" underperformed despite its acclaimed source material and an equally aggressive marketing campaign.