Yes, the helicopter is back! Kojima posted some new images of Metal Gear Solid V: The Phantom Pain. On the first one you can see both Snake and Quiet inside the helicopter. Snake is sporting his Roughneck Raven patch again. The other two show Snake who has once again been decorated with a few splashes of blood.
“Had changed my buddy from DD to Quiet. She still keeps herself at a distance.”
“Taking a break.”
Source: Hideo Kojima Twitter (1, 2, 3)