He was cut from the theatrical version.
I celebrated the day he announced they cut his scene. Poor guy but frankly that movie was going to be crap anyhow, it didn't need more to be put in. How the hell do you explain Wesley Crusher? The whole beginning of the movie would have been overshawdowed with questions of how and why.
Not really, because Wesley's time with the Traveler was never integral to the film, much like the backstories of much of the TNG cast when they transitioned to the big screen (like references to the Dominion War and the Farpoint Mission, they were mainly glossed over or mentioned only in passing if it was relevant to the current movie).
For Wesley, all that's needed is a brief throwaway line about his returning to Starfleet after being away for while, and even that isn't
really needed for a small cameo since it would be apparent onscreen that he was back, and may have been for a while now.