It's just been announced that David Tennant - yes! The Doctor - will be joining the cast of Marvel's new series for Netflix titled "A.K.A. Jessica Jones."
A former super-hero trying to rebuild her life as a private detective, Jessica Jones keeps getting drawn into cases involving people with unusual abilities. David Tennant is cast as her nemesis Killgrave - a villain from her past, he pops up again to wreak havoc in her new life.
In the comics, Killgrave was the real name of the Purple Man, a villain with mind control powers who used them to dominate Jessica and make her into his personal slave for months - one of the main reasons she quit being a superhero.
As any fan of David Tennant's incarnation of The Doctor will tell you, he will be able to pull this off with no problem. My prediction is that he will most likely play this as a "wolf in sheep's clothing" thing - we KNOW he's evil, but he's just so damn likable!