If you like totally free streaming shows about murderous Batman villains, you are in luck, friend. The new animated series Deathstroke: Knights & Dragons featuring everyone’s favorite DC universe assassin will be premiering on CW Seed January 6. The release date was revealed in a brief teaser trailer, and I do mean “brief” - the video lasts maybe six seconds and consists of a static image of Deathstroke blasting and stabbing his way through some goons. Then the show’s logo and release date appear on screen just before the trailer ends. Deathstroke himself would appreciate that efficiency. [caption id="…