The Avengers DVD comes out in less than a month and I hope it's more of an extended version like Watchmen did instead of just having deleted scenes.
One scene is brilliant but I can see why it was deleted. Maybe they'll include it in the Captain America sequel, who knows.
Another thing I noticed that everyone that Cap knew during the war was dead except for Peggy. Perhaps they're preparing that as a small sub plot of the Cap sequel.
After the events of the Avengers film, surely Peggy now knows that Steve is still alive though not necessarily well. He has some healing to do, that's for sure.
I think Peggy WILL be making an appearance in Captain America, the Winter Soldier.