The sequence in question, especially with Kara losing consciousness and slowly falling back to earth, looked like a nicely done Superman Returns homage to me.
Perhaps... except that she wasn't falling back to Earth. If she'd still been subject to Earth's gravity, she would've been in for a rough landing, but she would've survived it -- or maybe revived in the atmosphere enough to control her descent. (After all, she hadn't been kryptonite-weakened like Super-Routh was.) The problem was that she was adrift in space with no means to return to Earth. So it's not quite the same thing.