Check this out. When Magneto is giving his speech in the woods (they have their weapons, we have ours part), check just behind him when he raises his arms and says "And nothing shall stop us" or something like that. There is a handsome man with long hair and a leather trenchcoat. Could he be the elusive Mr Lebeau? Alongside Magneto were his "generals", the mutants with a name (Callisto, Arclight, Pyro, Jean, Juggy, Madrox, Quill) so it stands to reason he was also one of his "generals".
Perhaps they intented to put him in the movie but his role was cut after that scene was shot.
Perhaps they intented to put him in the movie but his role was cut after that scene was shot.