He was killed off, and the move was part comic book commentary on America’s contemporary and tarnished world image. He has or is supposed to come back sporting his familiar shield and (gasp!) a pistol.
Yes, but he’ll be back because his outfit is colored red, white and blue. This statement is not based on politics but on observation, many characters that have survived death wear the same tricolor: Sailor Moon, Optimus Prime, Starscream, Jesus (indirectly), and Superman (though he technically wears red, yellow, and blue).
The head of Marvel said for the next year or so Steve Rogers will not be Captain America. Bucky is Cap now. But of course he will come back eventually. He is too big of an icon.