The New Original Wonder Woman - S1-E1
Revealing mistake: When the elderly woman fires the submachine gun at Wonder Woman, the sparks created by her bracelets are bigger and brighter than usual, and we can see the wires under both of her arms to help create those special effects. We can even see the wires' shadows on the wall behind her.
The New Original Wonder Woman - S1-E1
Revealing mistake: When Wonder Woman is pushed against a wall, the wall shakes, revealing it's made of cardboard. (01:32:30)
The New Original Wonder Woman - S1-E1
Revealing mistake: When Wonder Woman rushes to the hospital holding Trevor, one can easily see he's been replaced by a mannequin.
The New Original Wonder Woman - S1-E1
Revealing mistake: When the two Germans are falling on their parachutes, their ankles disappear due to the blue screen.






Answer: The transformation twirling was invented for the 1970s TV series only, to explain her quick change from Diana Prince to Wonder Woman. However, it would have been nice to do a little spin homage in the movie.