Re: (Speculation) Captain America III: Fallen Son (The Death of Captain America)?
I wouldn't ever, by any means, title it "Fallen Son" and give away the death of the main character 6 months before they even film the damn thing.
Otherwise, yes. I want Cap to "die." I mean truly, does any Marvel character ever really die? That being said, it could just as easily be done in Avengers: Age of Ultron. Frank Grillo is supposed to reprise his role in that. Then Bucky takes up the Stars and Stripes in Cap 3. And finds some way of bringing Steve back. Time Gem anyone?
Then it can be titled "Man Out of Time" or "Sentinel of Liberty" or whatever.