kara will have fairly pleasant dreams revolving around krypton, if anyone's interested in visiting superman's homeworld.
leia, on the other hand, doesn't have the best of relationships with dreams (or sleep. she doesn't get nearly enough of it.) she'll either be rehashing past battles (endor, pirates, etc.), dreaming of what her life could've been like if alderaan hadn't been destroyed, or entertaining paranoia by having nightmares about becoming as twisted as her biological father. i'm leaning more towards the lighthearted second option.