Some time ago I've tried to find original music from SC2: Heart of the Swarm trailer or similar, with agressive and fast tempo, that fits to swarm nature and their style.

Here are Heart of the Swarm old trailer. Probably one of the best SC2 trailers, showing gameplay, story and new units with epic music at background.

(Audiomachine) "Berserker" - this is the name of the music track that you're hearing at background, and it's possible to listen without any background sounds and voices! Here are 210 seconds of swarmy epicness!

But what about more agressive and epic "swarmy" music? Here are some similar themes and maybe you'll like them too

Reminds me about C&C:Generals themes, but it's still great for Swarm invasions!

Remember that theme from SC2 and Blizzard Dota trailers?