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the meta of phase 4 - other than coming to terms with/consequences of super powers - is 'what are the offspring of the Avengers?'
Ironman begets all sorts of 'iron' heroes, Wanda + Vision creates offspring which will be part of New Avengers, there will be be a new iteration of Thor, et al
Sam & Bucky are offspring of Cap - that seems to be enough
Don't forget Hawkeye! Geez, what does he have to do to get some credit! He's an original Avenger for crying out loud. His series is about him passing on the name to his daughter, I believe.