It's a dig at the ending of batman Tony starts talking like he's going to retire. How he could leave it to someone else and then says I could but tthats not me cause I'm Iron man. Basically alludes to doing the same thing as batman then does a 180
You're a Bond geek so you should definitely watch it. The girl I went with is a major geek and she said she was expecting more from it, but still geeked out. As a casual fan, I enjoyed it for what it was - a well acted action movie, with at least one amazing sequence, a few (minor) preposterous moments and some good acting, especially from Bardem, Judi Dench and the kid who plays Q.