Chris Evans signed on for six Marvel movies when he became Captain America. Hes already appeared in Captain America: The First Avenger, The Avengers and Captain America: The Winter Soldier. That means hes already through half of the movies (his cameo in Thor: The Dark World does not count towards that total). Evans will also reprise the role in Avengers: Age of Ultron, Captain America 3 and likely Avengers 3. After that, its over. While its possible that Evans could renegotiate his contract, he recently stated his desire to retire from acting and work behind the camera, so its doubtful this will happen. With that in mind, its likely that Cap will meet his maker by the end of the MCUs Phase 3, or maybe a little bit afterwards. In the comics, Caps death occurred after 2006s Civil War event. While it was later revealed that his body had been suspended in time (gotta love comic book science), his death struck the Marvel universe hard. While its possible we may see Civil War someday adapted for the silver screen, I dont think Caps death will happen the same way it did in that story. Although with Frank Grillo playing Brock Rumlow, a.k.a. Crossbones, in the MCU, they could incorporate him as Caps assassin as he was originally thought to be in the comics (it was actually a hypnotized Sharon Carter). Its likely that that during the final battle of Avengers 3 (more on that later), Cap will go out in a final blaze of glory, and it wont be one of those fake deaths. This will be permanent. As much as the MCU embraces its comic book roots, there needs to be a sense of realism in that the heroes could die at any moment. With few exceptions, theres never been a superhero movie where the main hero is killed off. The MCU needs to get it across to the audience that though these characters are iconic, theyre not invincible. Caps death would send an emotional ripple effect throughout the franchise and be the catalyst for a new era of the MCU. Not to worry, though. Caps legacy will be inherited by another.