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I think that’s stretching it. The primary cast, the focus of the trilogy, Ridley, Driver, Boyega and even Oscar Isaacs are best known for their respective characters here. Id be surprised if there’s a significant number of us that we’re looking forward to a Llewyn Davis/Al Cody reunion in TFA.
Dern and Del Toro, being the better known entities like Guinness and Cushing were slotted in aptly sized roles.
If not as Hux, Domhnall is still best known as Brendan’s son. Christie and Serkis are never actually seen in the flesh (well, unless you count that eyeball peak.)
Russell isn’t going draw crowds on a name alone, despite how good The Americans might be.