So, now there's an actual full trailer for the upcoming film!

( Cut for embed )

... there's a trailer. Well, if you can call it that. It's a teaser trailer, so it's only about 35 seconds.

( Embed under cut )

Found this on Tumblr:

( Poster under cut )

Yes, it turns out Peter Firth wasn't just trolling us all for kicks (though he probably was a bit), there is an actual, genuine Spooks movie in the works.

What we know so far:

( Cut for spoilers just in case anyone's bothered, although it's not even filming until 2014... )