Well despite us having seen them already the Necrons are officially here to Advance Order. Beasts of War may have "leaked" the images weeks ago but after GW made them remove the images from their sight they released a teaser video stating 28th Oct as the order date.
As with the Dark Eldar we've been waiting a long time for a new set of rules for the Necrons. I'm always happy to see another army being competitive again. With the exception of Tau I think most of the armies can put up a decent fight in 5th now and I eagerly anticipate the Tau codex and possible miniatures. I hope the Necron codex is good and that start to see them on the tournament scene as something other than "oh isn't it nice that someone brought Necrons even though they're crap".