see i thought that as well and was gonna go into a huge post about how Transformers 3/Avatar was "built" for 3D..
but then again that 360 shot and the iron man scenes should be aweeeeesome in 3D even in post if they take the proper care. depending on how they shot it, some scenes in 3D will look better than others (flying sequences vs action shots with heavy SFX vs scenes with no SFX converted to 3D) <--the latter of these scenes will probably suck in 3D
I don't know man... I've been burned by Marvel before when it comes to post-converted 3D. Fool me once, shame on you. Fool me twice, shame on me.
Unless I hear that the post conversion is SPECTACULAR, I'm not paying for it.