This is basically a thread to talk about who the new Doctor will be, seeing as Peter has said he'll be leaving this Christmas (I left the title vague so I wouldn't spoil this for people (hence the SPOILERS in caps)). I suppose you can also speculate on other things, like what the series 10 plot arc might be. If there is already a thread like this, then I apologise. 

EDIT: Also, you can leave all your Vault and Unaired episode theories here too. 

I think DanTDM will be the doctor 

 No, just, no. He should just stick to Youtube.

 DanTDM doesn't even whach Doctor Who, he did do a mod showcase on this mod on update 39.