Though it’s literally only been DAYS since both shows were announced as being renewed, tag lines for next season have already been released.
Agent Carter Season 2:
“Dedicated to the fight against new atomic age threats in the wake of World War II, Peggy must now journey from New York City to Los Angeles for her most dangerous assignment yet. But even as she discovers new friends, a new home — and perhaps even a new love — she’s about to find out that the bright lights of the post-war Hollywood mask a more sinister threat to everyone she is sworn to protect.”
Agents Of S.H.I.E.L.D. Season 3:
“Director Phil Coulson (Clark Gregg) embarks on a deadly new secret mission to protect the world from new threats in the wake of SHIELD’s wars with Hydra and a rogue faction of Inhumans.”