Wanted: The Doctor

"I can’t wait to see who fills in that last window."

But obviously Who fills that last window, just like the other eleven.

And I'm sure there will be many more and there are many reasons why, I just can't be bothered to go into them again.

he can regenerate 12 times, meaning there will be 13 bodies, according to the old series.

@iron-hands even in the old series there were several hints that a timelord could regenerate way more than a dozen times. I won't bore you with them, but it can be entertaining trying to find them.