According to Marine Corps Times' Dec 28 entry, USMC is going to have an aerial tanker variant of V-22 Osprey as early as 2017.
The image below shows a concept description of the Tanker V-22.
"The V-22 Osprey is getting topped-off with a new capability. An aerial refuelling system is being developed for the tilt-rotor aircraft, turning the cargo and personnel carrier into a tanker that can provide fuel to other aircraft, mid-flight.
"The aerial refueling capability is going to be the next thing," for the Osprey, Maj. Douglas Thumm, the plans officer for the V-22 at Headquarters Marine Corps, said.
The Osprey's tanker system is in the early stages of development and won't be ready until 2017, he said.
When operational, the V-22 could refuel the Corps' fleet of aircraft, including the new F-35B Lightning II. It could also rendezvous with ground vehicles, land, and fill them up, Thumm said. Many of the Corps' ground vehicles can run on aviation fuel, he said..."
The part that is interesting is the aerial-to-ground refueler concept.
Read the rest on Marine Corps Times.