You can see a character in the trailer who flies using little pairs of wings on his ankle. He was seen descending at an angle as the wings fluttered to keep him from falling.
It appears that this would be a clear violation of the laws of physics. The character, who is human-sized, shouldn't be able to fly with such a small apparatus. He is not a person. He is a captain in the kingdom of Atlantis. Waiting for an analysis is a problem.
Before we dive into the physics of whether or not these ankle-wings would work, I think it's a good idea to give a quick review of the different ways heroes fly in the movie. If we included all flying superhero, there would be too many options.
It was like flying like an airplane.
A wing is a flat surface that moves through the air. The same thing happens with an airplane's wing if you stick your hand out of the window. The air gets pushed down by the air molecule. The air pushes up on the wing because forces are always an interaction between two objects. The force of the lift is called upward- pushing. The force is determined by the amount of wing tilt, the size of the wing, and the aircraft's speed.
The force from the air is backwards since this wing is tilted up. The effect is called drag An aircraft needs jet engines to push it forward because of the drag force.
The physics of airplane flight is explained in a few sentences. An example of flying physics explains why airliners cannot take off in hot weather.
Birds don't use engines to do all of this. They flap their wings to counteract the drag force. It is more complex than that. The turbulence of bird wings is different from the turbulence of an airplane wing. This is true for birds that can fly.
Who uses a wing method in the movie? There are two examples, Falcon from Captain America: The Winter Soldier and the Vulture from Spider-Man: Homecoming. Both of these characters have artificial wings on their backs.