Remember the casting report said they were up for two different roles, so I think Durand is the only one up for Crossbones of the actors mentioned. The other two are probably up for Zemo.
Natasha Romanoff - "Are you boys really that naive? S.H.I.E.L.D. monitors potential threats."
Bruce Banner - "Captain America is on threat watch?"
Natasha Romanoff - "We all are."