The rumor mill is churning and, this time, we're hearing that actor Joseph Gordon-Levitt could assume the role of Batman when DC Entertainment brings Justice League to theaters in 2015. I can't think of a better idea.

Here's why: Gordon-Levitt's character fades off the screen in The Dark Knight Rises in a way that strongly suggests he'll don Batman's cape and cowl in future films. Adding him to the Justice League cast now would allow time for a cameo in Zack Snyder's Superman reboot, Man of Steel, when it debuts next summer. Which, frankly, is precisely what Time Warner (NYSE:TWX) needs.

Just as Samuel L. Jackson introduced audiences to the character of Nick Fury in the closing moments of 2008's Iron Man -- a small set-up leading to a much larger (and more profitable) world of Marvel's The Avengers -- Gordon-Levitt's cameo could build excitement as it foreshadows the team-up to come. Find out more in the video below.

Fool contributor Tim Beyers is a member of the Motley Fool Rule Breakers stock-picking team, and the Motley Fool Supernova Odyssey I mission. He owned shares of Time Warner and Walt Disney at the time of publication. Check out Tim's web home and portfolio holdings, or connect with him on Google+Tumblr, or Twitter, where he goes by @milehighfool. You can also get his insights delivered directly to your RSS reader.

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