The cinematic trailer thing was no doubt among the coolest ones I have ever seen. I just wish the stabbing banshee would get her head torn off a a second later, and that the roaring support marine would actually kill something in his roar. The dreadnought throw to the stone wall is priceless.

"I came to destroy you."

Banshees rock. Well, at least in table-top they do. They're like pansies in DoW.

Eldar are actually pretty serious when it comes to chaos, but yeah. And not sure why she would be worried about Tyranids. Sure, lost planet, but it can be redirected if it was an Eldar planet.

Edit: On closer inspection, toward the middle where it stops panning up, there is something looking vaguely like a Tyranid Hive Ship, inside a spore cloud, and what looks like the beginning of a warp storm or tear. Not good. For them, anyways. Woot!