The Vampire Diaries is branching out with a potential spinoff called The Originals - and have just released a poster:
The show will star Joseph Morgan (Klaus), Claire Holt (Rebekah), and Daniel Gillies (Elijah), the three remaining Original vampire siblings, and be set in New Orleans. Also joining the cast are Phoebe Tonkin (Hayley) who will repriese her TVD role as the werewolf who helped Tyler break his curse. New to the show(s) is Charles Michael Davis, who will play Marcel, Klaus's former protege.
The Originals is a "backdoor pilot," which means it was shot and will air as part of The Vampire Diaries. The episode, titled "The Originals" airs April 25th on the CW. A decision as to whether or not the show will go into production is expected in May.