But I don't think it means the doctor will regenarate
你 see in RTS's book it says that the doctor meats the doctor (I think that means future doctor) and then becomes his companion thats why it's called the 下一个 doctor, even though the doctor doesn't regenerate we see what the 下一个 doctor will look like
So to 包, 换行 it up the 标题 "The 下一个 Doctor" doesn't mean that the doctor will regenerate it means that we see what the doctor will look like after hi regeneration which will be in a future episode