First off, it has been confirmed that in addition to a possible Hulk TV show, there will definitely be a S.H.I.E.L.D. show, released on ABC, directed by Joss Whedon. There have also been some new developments which you can read about here. Also in this post, you can see that the release date of "The Avengers 2" is May 1, 2015. Yay!
"The Avengers" will be released on DVD on September 25, but some deleted scenes are already available to watch. These include an alternate opening (one I think I might have liked better than the real thing), and some moments of character development for Steve Rogers and Bruce Banner. The Bruce Banner one lets the anonymous security guard (briefly shown in the movie) ask the former some deep questions, while the Cap one reveals that Peggy Carter is indeed still alive, and also shows Steve's introduction to Tony Stark, in way which makes the movie make a lot more sense. It also has a Stan Lee cameo (more yays!).
The last subject I'd like to touch on is an interesting idea that's been being thrown around the web (POSSIBLE AVENGERS SPOILERS). First, a bit of background. The character the Vision was an android created by Ultron, who was, in turn, created by Ant-Man. Ultron was originally supposed to be a servant of sorts, but eventually he turned evil, as intelligent androids tend to do. He created the Vision to serve him, but ironically, the Vision decided to turn against his master and become good, later joining the Avengers. The Avengers decided to put the consciousness of the recently deceased Simon Williams (Wonder Man) into the Vision (to make him more human, or something). Anyway, here's the big idea: Agent Coulson will become the Vision.
It actually kind of makes sense. Whedon has already said he doesn't want to deal with Wonder Man, so if the Vision will be anywhere in the movies (and he'd better) they would have to find someone else's consciousness to put in him. Also, Clark Gregg (Coulson) is supposedly signed on for more movies than he's been featured in, so that should be a clue.
You can read more about that in many places on the web, and hear many more reasons why it might be true. The main reason I wouldn't want it to happen is, I guess, somewhat obvious. In "The Avengers", Coulson's death was supposed to be the event that the Avengers needed to Avenge. To negate Coulson's death would take much of the emotional force out of the founding of the Avengers. But I suppose, if this is what will happen, they'll find some way to make it work. And I'll leave you with some photoshoppers' renditions of Coulson/Vision.