Show Stark actually hanging out at the SHIELD headquarters in a scene or two and introduce him to Hank Pym and Wasp (can't think of her alias' name). They are working on the Pym Particle experiments and some AI project. They are Avengers already, having joined the team outside of filming (already SHIELD associates in RD).
Black Widow could a cameo as a SHIELD agent... not an Avenger member... "yet".
Also, give mention to a strange energy surge... somewhere that SHIELD has detected. They are monitoring it and trying to figure out its nature and origin... No more mention for a while.
After all the action for the core storyline of the film plays out (hopefully IM v. Mandarin), then the movie closes with mention of the energy surge again, and IM goes to investigate. While at the site and taking some readings... a strange figure appears on a nearby hilltop, with long golden hair, a cape, and a huge hammer. He says "What is your purpose?" The credits roll...

Show Stark actually hanging out at the SHIELD headquarters in a scene or two and introduce him to Hank Pym and Wasp (can't think of her alias' name). They are working on the Pym Particle experiments and some AI project. They are Avengers already, having joined the team outside of filming (already SHIELD associates in RD).
Black Widow could a cameo as a SHIELD agent... not an Avenger member... "yet".
Also, give mention to a strange energy surge... somewhere that SHIELD has detected. They are monitoring it and trying to figure out its nature and origin... No more mention for a while.
After all the action for the core storyline of the film plays out (hopefully IM v. Mandarin), then the movie closes with mention of the energy surge again, and IM goes to investigate. While at the site and taking some readings... a strange figure appears on a nearby hilltop, with long golden hair, a cape, and a huge hammer. He says "What is your purpose?" The credits roll...
t: I am having a bear of a time on another thread over some ideas. Oh well, can't hit the mark everytime.what, you mean cameos..?which marvel character you wana see in the sequel
and Pym maybenick fury and banner
I believe some of the characters that are rumored to appear in the Avenger movie need more cameos than others. Ant Man and Wasp (if Wasp is still rumored to be there) come to mind. We all know that an Ant Man movie is in talks with Wright at the helm (last I heard) but I'm not too sure how that will do as a stand alone movie. Ant Man isn't a very popular and well liked character in the MU, imo.
Since it appears that Marvel is going with The Ultimates version of the Avengers, they should definitely have Mr. and Mrs. Pym in Iron Man 2. Janet's name was already mentioned in TIH so let's not stop there. They're scientist and they can meet Tony while he's researching something, anything.
Now, since I brought up TIH, we know there was a small Thor reference regarding the storm. We can see Tony having a business meeting (dinner) with a really big blonde guy. These are just some quick thoughts.
The bottom line for me is that Henry and Janet need more screen time from the more popular characters like Iron Man, The Incredible Hulk and Captain America so they can have an impact on the Avengers movie...unless Henry and Janet won't have that big of a part than we thought.
- I'll catch you on the flip side!