Captain America: 75 Heroic Years

Marvel has announced they will be airing a one-off special about the history of Captain America on ABC on January 19 at 8/7c (directly before the season premiere of Agent Carter). It will feature interviews with various celebrities including Chris Evans, Hayley Atwell, Stan Lee, and Clark Gregg. There will also be "an exclusive announcement from Marvel comics." Note that they said they announcement is from Marvel comics and not Marvel studios, so it may not relate to the MCU.