I would expect REAPER to remain an UOR and continue supporting the Afghan mission for a few years yet - otherwise, the Afghan National Security Forces will suffer from a lack of ISTAR and CAS platforms.
Don't forget that Project SCAVENGER is still on the table and the REAPER UOR could always win that. In fact, in these fiscally challenged times, we would be mad to consider anything else.
IMHO, of course
LJ