I mean , seeing how the poster looks like , I bet Yelena would have to do some sacrificing , either her dad or herself . There is also a chance that she takes a romantic relationship with Bucky , and maybe that's the choice she has to make .I think this movie feels wonky. With a supersoldier who fought against thanos , to 2 family of black widow, with people who gave short cameos and then a fake supersoldier. But then they had to add sentry , which might seem a bit OP now. But based on how Adam warlock was treated, sentry might be less powerful than we think he is going to be