Marvel Studios has released a new Avengers trailer in Germany and it shows a lot more of Bruce Banner than the first one, including a scene with him and the Black Widow. Check it out here Spinoff Online
Hopefully future trailers will show more Hulk also. Based on what I have seen so far, I am really looking forward to this movie. Still not sure of Mark Ruffalo as Bruce Banner as he seems a bit too bulky to be puny Banner but I am willing to go in with an open mind.