None of the previous Doctor's have met the 12th version of himself.
He will regenerate into the 12th Doctor.
Who is the 12th Doctor of Doctor Who? The Answer you seek is Actor Peter Capaldi.
He'll regenerate into the 13th Doctor.
The 12th episode of Series 4 was called 'The Stolen Earth'.
A Red Bicycle, i believe.
hes the 11th docter
Not much is known yet about the 12th. Doctor. You can see him briefly in the Christmas Special 2013, but to see more of him you'll have to wait until the regular episodes are broadcast.
The production team have not started looking for someone to play the 12th Doctor as of yet.
The current doctor (11) Is played by Matt Smith, and the newly announced 12th doctor will be played by Peter Capaldi.
Whether Peter Capaldi is the best choice or not , he'll be the 12th Doctor Who .
They won't be planning that far ahead, Matt Smith will probably be around for a few years, when he decides to leave then they will start looking for his replacement, not now when he has only just started.