I've always been more of a movie buff than a comic book guy, and my favorite superhero movies are the ones when a director perfectly blends both to make a great movie featuring superheroes, as opposed to making a good comic book movie but not a great film.
People love the first Avengers, maybe it is a great comic book movie (I don't think it's even that), but it's not a good movie. There's very few superhero movies that I actually believe are really good movies that someone's grandparents can actually sit down and enjoy as well.
I guess it depends on which X-Men film you're talking about, FC, or DOFP? Sure it can top those, I doubt it though, I consider those to be great superhero movies, but not great movies. When I think of great superhero movies that really can stand on their own as movies, I think of Batman Begins, The Dark Knight, and X2, those are the only superhero movies that I really felt were great movies. I thought The first Iron Man came close to being a great movie as well, but the third act became a stereotypical superhero movie, but I loved the end with him telling everyone he's Iron Man, that was different and fresh.
Those spoilers just seem like something a fan could have cooked up, I was hoping to see both guys have a battle of ideals, but it just seems like someone is pulling the strings.