You'd certainly never know from watching this that Big Hero 6 is a superhero team that has at times included The Wolverine movie villain Silver Samurai. Actually, a casual viewer wouldn't even know this had anything to do with Marvel, which is never mentioned - the teaser instead namedrops Frozen and Wreck-It Ralph, and uses the exact same "can't fit into the super-suit" gag as the first Incredibles teaser.
Disney may be afraid that marketing an all-out Marvel animated movie is too weird, and going for the safe spot at the moment. I know I was hoping for something that looked more interesting...and I still do. But the kids will probably laugh, and that's the idea.