Lateral airbag cushions for preventing or inhibiting inboard occupant excursion. Some embodiments may comprise an inflatable cushion configured to deploy adjacent to a vehicle seat laterally of a vehicle occupant and a tether coupled with the inflatable cushion. The tether may be configured to be coupled to the vehicle seat at opposite ends and may be configured to, upon deployment, form the inflatable cushion into a pocket or other lateral engagement structure adjacent to the vehicle occupant to engage a shoulder and/or arm region of the vehicle occupant to prevent or at least inhibit inboard/lateral excursion during an impact event.