IGN FilmForce investigated the matter, however, and learned that Dark Phoenix is indeed the big villain in X3. Not the Sentinels, Mr. Sinister, Dr. Bolivar Trask, or the Hellfire Club. We were cautioned, however, that it still doesn't make her the main story. So far this is in line with what Arad has said. So what gives?Well, there's a reason why 20th Century Fox is developing a Wolverine spin-off and not a Jean Grey spin-off. X2 had Wolverine (a relative outsider to the Xavier Institute) finally becoming more of a team player and acting as a guardian of and leader to the younger mutants who fell under his care. Expect X3 to continue down this path by exploring Logan's growth as a vital.
That kinda sucks that the movie is going to revolve around the Wolverine character, I know everyone likes him, but I think we had enough about him they need to give some screen time to Jean and Scott. Let's hope that he doesn't take all of the spotlight.