[Delvo]

I'm told that there was a scene in the first or second one, in which a computer screen was shown on-screen, showing a series of files with the names of various X-Men who were known major characters from the comics but didn't otherwise appear in the movie. One of them was Gambit, labelled with his "real" non-X name and not in uniform or looking different in any other way, so only informed comic-book fans would have caught it. I'm also told that another picture in that scene was labelled "Hank McCoy", although that person was not blue or furry (and wasn't Kelsey Grammar).