User blog comment:Mr. Xemnas/New Lego Marvel Superheroes FINALLY Characters Revealed!!/@comment-1895174-20130224192151/@comment-1895174-20130225232609

Again, you can't use a wiki site as a source. And even then, the page says:
 * His role, if any, in the game is currently unknown. The game informers magazine says there is an Oscorp level. It is unknown if he will be in that level or not.