Just a couple of quick thoughts, Namor has been referenced in IM 2 and we know it wasn't for nothing. In the trailers we can see a jet landing on the helicarrier and a vast ocean in the background. If the battle is taking place in New York, then what does the clip in the trailer with helicarrier on the ocean have to do with. Why would the team be out in the middle of "no where" on the ocean for? Maybe this will have something to do with Namor or Atlantis. Secondly whatever the flying creature chasing Iron Man is, it’s surely not a ship, you can see that it has teeth in its mouth and moving wings. Why would a ship have a mouth that opens and closes with teeth in it & flapping wings? I also want to address the Frost Giant rumors, the army can't be Frost Giants because where was all this technology at in the Thor movie. In the Thor movie they appeared to be a very primitive race and had no technology when fighting with Thor and his buddies.