The faction is disbanded and the leaders probably won't do anything. I myself was thinking with some folks to start playing those characters again, as I was a member of RoS myself.
Cayman isn't your average system for sure. If RoS doesn't come to life in any time soon, Cayman will probably be deleted or be renamed as part of Omega systems.
Until then , Reapers of Sirius are dead, for good.