It's from New Zealand, hence the alternate Avengers title - the John Steed and Emma Peel version has considerably more name-recognition in other parts of the world. But Yahoo has a version of this one up with credits on it, so it looks like this may be the final version. And all those Iron Man suits flying into the air would seem to be a revelation of...something. Are they all being taken over, or all fighting on Stark's behalf?
Either way, gives us just enough room to speculate, as a good tease should.