Hulk in Iron Man Movie? I Don't Get it

A scooper told AICN that the incredible HULK will have a cameo in the upcoming Iron Man movie, or vice versa. All he could say is that they are filming a scene together to mix the two universes.

I agree with our friend Richard at FilmStalker. This makes 0 sense. Lets say HULK is in the Iron Man universe, how can you make that a cameo? Hulk is destroying the city and along comes Iron man to say 'bad boy' and then fly away? The Hulk is FAR to big of a character to just throw willy nilly into the Iron Man movie. On top of that I dont get the logic. Why do we need the HULK to be in the first movie? Its to much. We are just getting introduced to Iron Man and we dont need the HULK to make the movie work.

Anyrate the rumor may be true, it may not but I think its totally un-needed.