In case you missed it yesterday like I did (I was driving most of the day), a new Kill Team Website is up! It has a great introduction into the game plus a quick look at all the factions.
The new site is here and you can find links to it from the Warhammer 40000 main page, Games Workshops site, etc.
An introduction Video on How to Play the Game
There is more there, where you can share your kill teams on Instagram to get a chance to get them in their gallery as well as a look at the different Killzones in Kill Team.