We had already established that the remaining USMC F-18A/Bs are in-line to be replaced with New purchase F-18C/Ds. That just left their F-18C/D Sqns future unresolved.
It has now been revelaed they are al going to have their radars replaced with AESA radars between 2020-2022. Presumably the amortisation period will be more than a couple of years, so they won’t be replaced by F-35Cs any times during the 2020s.....
USMC to upgrade Hornets with new AESA radar | Jane's 360