Re: (Speculation) Captain America III: Fallen Son (The Death of Captain America)?
Thor II: TDW/CA II: TWS/GOTG/Avengers: AOU > Antman > Thor III > Iron Man 4...
...CA III: Fallen Son/TDoCA (include Bucky's redemption)
into Avengers III with Bucky & team avenging Steve as Captain America with a tease in the credits about with Steve's return. even set up Tony's move from behind the suit into leader of SHIELD.
Therefore Chris' 6th film can be Captain America 4 and be all about his legacy.
...feather oars, the world tilts back and poison pours.