Steve Rogers/Captain America Will ALSO Sacrifice Himself
The death of Captain America is another one we called prematurely, but since we know Avengers 4 is Chris Evans's last movie, it's not a stretch to imagine that he'll be going out on a big note. We all know how much of a stickler for the greater good Steve is; it's more than likely he'll die sacrificing himself for his teammates and the universe.
But does that mean Captain America will be gone for good? It doesn't have to be! In the comics, the shield has gone around multiple times, but most notably it's been passed on to James Buchanan "Bucky" Barnes and Sam Wilson. While both are ready and present in the MCU, we don't really see Bucky taking up the alter-ego just yet. He's still recovering from the effects of that brainwashing incident and seems more at home in Wakanda than he would be putting on the Captain America suit. Sam seems a more likely fit to assume the helm in the wake of Steve's death (or retirement, for the optimistic fans).