THE ANSWER IS- IT WILL FLY
READ THIS AND PAY ATTENTION!!!!
Imagine your in a pool standing in water up to your chin on a treadmill. You are walking on the treadmill in the water. Your feet are pushing against the surface of the TM. NOW, you start to move your arms (jet engines) in a swimming motion while still on the treadmill. If you do this vigorously enough you WILL sart to move relative to the water and the ground, your feet(wheels)satrt to slide across the surface of the TM no matter how fast the TM is turning against you. You will be moving in a horizontal direction. Hypothetically if you keep accelerating (moving your arms-jets) fast enough you would gain enough speed to create enough pressure (air) under wings to get lift in the verticle direction.
You can think of water as denser air because it behaves the same way physically
And who cares if the TM moves in the opposite direction at the SAME speeed the plane is moving. It can be moving 800000000000000mph it doesnt matter. the plane moves foreward