As for the rest of the Mikaelson family joining the series there is no news yet.
If you are wondering when you will be able to watch this first episode I have good news for you: in a few months, to be more exact: the April 25 episode of the Vampire Diaries will serve as the pilot for this potential series called „The Originals.”
There is nothing sure yet, but if this episode that will air on April 25 will be received well and if the ratings will please those from the CW, the show could air as early as next season.
In this potential first episode of „The Originals”:„Klaus returns to the French Quarter of New Orleans, a supernatural melting pot that he helped build centuries ago, and is reunited with his diabolical former protégé Marcel. Intent on helping his self-destructive brother find redemption, Elijah must side with Marcel’s enemies to keep Klaus in line.”
I remember that I was fascinated with episode 3x08 "Ordinary People" in which the producers told us more about the original family and how they became the original vampires. I love this storyline and I was ecstatic when I found out that the CW is developing this spin-off. I know that the producers of the Vampire Diaries listen to us- the fans and I’m really glad that they have decided to make this new series. I really hope that this episode will be good and the series will be picked up by CW.
I don’t know if you remember but episode 24 (season 2) of Gossip Girl served also as a backdoor pilot for a potential Gossip Girl spin-off series set in the 1980, centered on the mysterious past of Lily van der Woodsen, called "Valley Girls". Unfortunately, the spin-off series was not picked up.
What do you think? Are you as anxious as me about this Vampire Diaries spin-off?
Sources:Tvline.com, Cw.com, Google.com