The titles for the stories have been revealed. 2 parts each, as per usual:
The Nightmare Man
The Vault of Secrets
Death of the Doctor
The Empty Planet
Lost in Time
Goodbye, Sarah Jane Smith
I think we can safely guess which one features the 11th Doctor.
I also noticed that, like in all three previous series, there's a story with Sarah Jane's name in it. All three of the previous ones involved The Trickster trying to get rid of her, so it's probably a safe bet we'll see the same in "Goodbye, Sarah Jane Smith".
The Nightmare Man
The Vault of Secrets
Death of the Doctor
The Empty Planet
Lost in Time
Goodbye, Sarah Jane Smith
I think we can safely guess which one features the 11th Doctor.

I also noticed that, like in all three previous series, there's a story with Sarah Jane's name in it. All three of the previous ones involved The Trickster trying to get rid of her, so it's probably a safe bet we'll see the same in "Goodbye, Sarah Jane Smith".