I think they will give us the iMac 2012 refresh in one of these two events.
I don't think there will be much to say about the iPhone 5; iOS6 is already (partly) presented, the new screen size and maybe LTE. None of these things are revolutionary - LTE will not be usable for most consumers for a while yet.
I'm guessing the iPad Mini is not particulary revolutionary either.
It is a smaller iPad, the size of a Galaxy tab, and not much more than that, right? Not much to talk about really.
So a brilliantly beautiful new iMac would be a clever add-on to one of these presentations. I know iOS and OSX - devices are not normally presented in the same events, but I really don't see why that is a problem. And Tim Cook does things differently from Steve Jobs anyways, so what's to say this won't be different as well..?
Anyone with me?