I've always thought that X-Men had a LGBT theme. I haven't watched the movies for a long time but I think there was a scene in the second movie where Iceman was showing his powers to his parents and it seemed like a parallel to a LGBT coming-out situation.
Wikipedia says:
LGBT Themes: Another metaphor that has been applied by some to the X-Men is that of LGBT rights. Comparisons have been made between the mutants' situation, including concealment of their powers and the age they realize these powers, and homosexuality.[15] Several scenes in the X-Men films, two of which were directed by openly gay director Bryan Singer and include cast member, and openly gay actor, Ian McKellen (who plays Magneto) have been said to illustrate this theme. In the comics series, gay and bisexual characters include Anole, Destiny, Karma, Mystique, Northstar, Graymalkin, Rictor, Shatterstar and the Ultimate version of Colossus. Transgender issues also come up with shapechangers like Mystique who can change gender at will. The comic books also delved into the AIDS epidemic during the early 1990s with a long-running plot line about the Legacy Virus,[16] a seemingly incurable disease similarly thought at first to attack only mutants. Ironically, while the X-Men had the Legacy Virus, they are incapable of getting AIDS due to their genetic mutation being able to combat the disease. A similar storyline appeared in the X-Men animated series that aired in the 1990s.