Age of Ultron Trailer: What's in Store?

I expect that anyone who breathes oxygen has seen the new Age of Ultron trailer. If you don't breath oxygen, here's it is:

Okay, now in the trailer you see several versions of Ultron, the killer robot that we expect has been built by Tony Stark. This means they are staying fairly close to the comic Ultron, who constantly rebuilds himself to become more powerful. Second, you see the twins from the after credits scene of Captain America: Winter Soldier, Scarlet Witch and Quick Silver. Although Marvel has to really try to beat X-Men: Days of Future Pasts's Quick Silver. Finally, we see Hulk destroying stuff, and even the Iron Man Hulkbuster armor about to be put to use. This could hint that Marvel is ready to shoot Hulk into space to stop him. Planet Hulk anyone? Anyway, I will be posting about the upcoming phase 3 marvel movies!