The alternate opening of the Incredible Hulk that should be on the upcoming DVD of the movie has found its way online. This alternate opening o the Incredible Hulk features a point when Bruce Banner was tempted to give up on his quest for the cure and wanted to kill himself:
Around the 2:22 mark one is supposed to see an Easter Egg: Captain America is frozen in the ice, and one may see his indestructible shield. But this leaked opening of the Incredible Hulk is not of great quality so you'll have to make do with this screen capture:
I admit I am still looking for Captain America in this alternate opening of the Incredible Hulk though... It is not as clear as on the screen cap...
Shall wait for the official release of the Incredible Hulk DVD then!