Chris Evans has two movies left in his contract ladies and gents. Those movies are Captain America 3 and Avengers 3. Cap 3 will not be "The Fallen Son" because he does not "die" in that film. The tragic passing of the mantle and "death" of Steve Rogers will occur in Avengers 3.
All though Evans wants to take a break from acting and direct movies. I don't think Evans would mind small time acting for Marvel in post credit scenes. If Phase 3 has Moon Knight and Valkyrie, then I think Evans could show up at the end and recruit them for Secret Avengers. What do you guys think?