Originally Posted by herolee10
Well before any plot emerges regarding rocking their newfound bromance; one must wonder on why Hulk at least won't show up to try and help Stark since unlike Captain America, SHIELD (BW/Hawkeye), and Thor, Hulk is really the only one that won't have anything really big going on and we know that Banner watches the news and is kept up-to-date about the major stuff happening in the world and I would think that Stark being attacked by Mandarin would catch some media attention.
That is easily explained. Banner went off the grid after The Avengers
. Feige stated that Tony dropped Bruce at the Port Authority and he headed right out of town. Since Bruce likes to go to really remote places, usually outside the US, we can assume that he is going to be somewhere on another continent when Tony is attacked.
Say Bruce is in Asia or South America again. Returning to the US, presumably without a passport or much money, would take quite a while. Hulk doesn't fly, he leaps, and he can't be expected to care where Banner wants to go or even to be able to aim himself at the right place. It's not like he has some sort of internal GPS guiding him. On top of that, the trailer made it look as if Tony himself has to go off-grid as the result of Mandarin's attack. If that's the case, Banner/Hulk wouldn't have any idea where he was anyway. Another factor is time. The events of IM3 could very well take place quickly, over the space of a couple of days, which wouldn't give Banner time to get to Tony. There would be no way for Hulk to help if he couldn't reach Tony and didn't know where the billionaire was even if he could