I just don't see him translating to the screen very well (outside of a non-superhero/costumeless role). He doesn't look as outright silly as the Vulture, but he's pretty close. Plus he's somewhat redundant/repetitive to Rhodey- I don't think they want to give the impression, with the mere handful of total marvel films they'll appear in, both Iron Man AND Captain America having "black sidekicks" (let alone "another" technologically-based FLYING black sidekick), as opposed to stand-alone heroes like Black Panther, Luke Cage or Blade (although, granted, War Machine stands on his own much easier than the Falcon). I could easily see them working the community-activist-team-up angle into a sequel, but not the flying hero side-kick aspect. He could be the equivalent of the SHIELD Agent in Iron Man- a non-main-character supporting ally. Between Rogers, Bucky/Winter Solider, Red Skull, Fury, Stark, Sharon Carter, Black Widow, US Agent and whatever other military characters they'll have to utilize- I just don't see there being room for a D-List character like the Falcon, unless it's like, Captain America 4 or something (and by that point, I'd be surprised if they weren't considering a Bucky-takes-over recasting to continue the series on).