Captain America Hulk Cameo

Movie cameos in superhero comics or other references or harbinger?
Does anyone know what movie cameos superhero? Like the kind of secrecy that only dedicated fans usually pick up? I saw Captain America on ice in the alternate ending of the latest Hulk movie. Or the one in the end, where Stark says supersoldier the program was placed on ice. I also referenced in The Dark Knight (Spoiler warning?) Catwoman for a future when Bruce asks if your armor protects against dogs.
Well, those are the ones I notice … 1.Spider man 03/02: Peter profess the school with his arm missing is the guy who becomes the lizard. 2.Spider-Man 3: Peter profess is looking for a piece of the action of the poison, which could become part of the carnage. 3.Iron man: In the end, when Tony gets pepper taking the suit off, you can see the shield of Captain America. 4.Dark knight: when Batman goes to Commissioner Gordan's house and you can see Lil 'daughter and she has redhair insinuate batgirl. hulk 5.New: The scientist who helps transform the Abomination Emil Blonsky is hit with gamma rays and some see him becoming the leader (Ie, head turns green and growing).