User blog comment:Gcheung28/Fannotate the Latest Avengers: Age of Ultron Trailer/@comment-24895270-20141025200742/@comment-24895270-20141025202402

True but there hasn't been any mention of it in any of the other MCU movies. I think the rights are based on recognition which is why Sabertooth isn't part of the Iron Fist rights and Quicksilver/Scarlet Witch are equally known for X-Men and Avengers. Honestly if that were the case then Wolverine would have been in a Hulk movie by now.