Zombie Ginsberg’s head will rot off sooner rather than later. Not sure who else you expect to go.
Kennedy's summer 2017 retirement decision is widely rumored and well-sourced to former clerks of his. He (Kennedy, age 80) is over the moon that Gorsuch, a former Kennedy clerk, was nominated by Trump -- giving Kennedy the confidence that his (Kennedy's) own replacement will be a solid one like Gorsuch.
Breyer's no spring chicken either at 78.
Kennedy, maybe Breyer. Heard Thomsd wants to retire.