8 ways The Avengers can appear in Iron Man 3 (without appearing)

"Nothing's been the same since New York" says Tony Stark in the first trailer for Iron Man 3, before having a very bad day. With the arrival of a new trailer this week it doesn't look like his situation has improved much - so why aren't his Avenger superfriends lending a hand? Writer-director Shane Black has probably got this covered, but just in case he missed Avengers Assemble at the cinema, here are some ways Thor, Hulk and co. can be shoe-horned into the film at short notice without having to assemble the expensive cast!