Note: This post contains SPOILERS for Captain America: The Winter Soldier as well as major speculation about and potential spoilers for next year's Avengers sequel, The Avengers: Age of Ultron. Read at your own risk.
Nearly two years have passed since Clint “Hawkeye” Barton and Natasha “Black Widow” Romanoff stole scenes and hearts in The Avengers, the end of which saw the pair of SHIELD agents/assassins driving off
into the sunset together for parts unknown. Ever since then, many fans—myself included—have been dying to know if there actually is more than friendship between them (I made my case back in 2012 for why I believe they're TOTALLY in love) and how their relationship will be depicted in future films.
Based on new evidence gathered from Captain America: The Winter Soldier (in which Natasha had a part but Clint was mysteriously absent), interviews with the directors and cast about that movie, and a blind item posted by an entertainment blogger, I am inclined to think that not only is there more than friendship between them but we'll get to see at least hints of their romance on screen in Avengers 2. Basically, fellow Clint/Natasha fans, I do believe our ship is about to set sail.
Here's everything I know so far. Let's get to speculatin'. (And to be absolutely clear: This is JUST speculation based on rumors extrapolated from interviews and such, NOT actual knowledge of future films. Your guess about what will happen is as good as mine.)