They know their craft and can find some innovative solutions to the challenges that the battle room will present. I know that Lloyd is playing Ender. Most every available child actor in Hollywood will be brought in to audition for the roles in this film since it calls for a large child actor cast. So it's safe to say everyone is being considered. The Future has not been written.
Nothing is for certain.
However, I am filled with a new sense of optimism. Additional Information Mr. Kennelly also wanted to reiterate two points. Jake Lloyd is only being considered for the role. He has NOT been cast as Ender Wiggin. Anything involving some technical aspect about the movie itself will not be decided until a director is signed.