Hmmm, see here you are all going 'I don't think Jean is Dead' or 'they should bring her back'.
In the comics, alot of the X-Men(and the other guys) are revived numerous times, but in the world of Film, don't you think the movies would start to lose some of its integrity if people are killed in one movie and revived in another.
It kinda makes you feel 'whats the point of killing them'.
Now to N4H's question for Gambit.
Personally, i feel the entire 'Cure' story should be taken out, as neither that or the Phoenix one was properly done. Had they focused more on the Phoenix Saga(leaving the 'Cure' story for a new 'Apocalypse' Trilogy) they would have had plenty of time to bring in Gambit, give Scott a proper death, allow Phoenix to truly rise and give one or two other characters *cough cough Rogue cough cough* more deserving screen time.
HOWEVER, i read somewhere that it wasn't lack of screen time that made the decision to 'No Gambit' it was Josh Holloway(Sawyer - Lost).
He was the ONLY actor wanted for the role but he turned it down as it was too similar to his Lost role.