Thanks to Rupert Murdoch's recent overture, Time Warner shares have traded more on drama than fundamentals. Now that he has dropped the approach for good, investors will need to face reality.

Shares of Time Warner plunged about 13 percent Wednesday after Murdoch's Twenty-First Century Fox withdrew its bid for the rival media conglomerate on Tuesday. Time Warner shares had surged a few weeks earlier after Murdoch made an $80 billion offer to the company.