As a trailer, The Last Message more or less does its job.  It gives a little bit of excitement and hints as to what the Time Lord Victorious is all about, but doesn't reveal too much.  If anything, this trailer might be a little too simple and too secretive for its own good.  I can infer a lot from the trailer, but only because I already have a sense of what Time Lord Victorious is all about.  A newcomer wouldn't have anything to go on just from this trailer.

Still, it looks cool as hell.  The details around the damaged Dalek are very well realized - you can see it in just about every part of the Dalek casing and I was thoroughly impressed by the visual art in this minute-long trailer.