meeeh
this was....eeh, i didn't find it funny. johnny utah's iron man sketch in this MvC3 parody series was funny as hell b/c utah has that obnoxious sense of humor, which totally fits tony stark. the wolverine one luis did was pretty funny too b/c it was wolverine, a total badass, giving you the 'drill sargent treats you like utter shit' treatment, which somewhat fits wolverine and makes it funny (but not as funny as the utah's iron man)
but this was, ugh, i don't get it. it was very middle school humor. if i were 12 or 11, i'd be laughing pretty hard. but i'm not, i'm 17 and i laugh at witty humor (thank god for british television). ok, she hulk's got massive titties despite them being normal size compared to her BMI when she's she-hulk. that's just not something i'd think Cpt. America would say. if you had made captain america say something funny within his character, like hear a door close and suddenly go crazy with Post Traumatic Stress Disorder (or commonly known as shell shock syndrom) while he was giving his speech, that'd be pretty damn funny. or maybe if Cpt. America said something slandering the japanese characters like "those foreign invaders are placing the lives of the american people at risk! we need to drop atom bombs on them!!!" that'd be funny.
but alas, this is newgrounds, witty humor is bleak and is reserved for the higher thinking....