User blog comment:Mr. Xemnas/PLANET HULK SET FOR 2015 WHAT!!!!!!!!!!!!!! AVENGERS 3WORLD WAR HULK?????/@comment-1671874-20130207051018/@comment-1895174-20130207181744

Yeah I don't consider stuff like that "canon". No one who had a part in making the movie had any input on that encyclopedia, so the character was probably just mislabeled by someone who just didn't care.

Primary sources are where it's at.