Yeah, I know... it's not a regeneration yet, but it's certainly a sad news. Peter Capaldi announced as he will leave Doctor Who this year in the Christmas special. While I'm sad he's leaving the show and the Tardis behind (not to mention to the huge fan base as well) this decision was almost inevitable. Many of the Doctor Who actors before made this decision and wheter we like it or not, this has to happen. Personally I understand the actors, as they want to try new things, play other characters, because if they just play the Doctor they won't be able to get recognized from anything else. Something that Star Trek actors often had a problem with back than... :/
I'm deeply sad about the news, as Peter Capaldi is a brilliant actor and I do enjoyed watching the adventures of his Doctor. He is a brilliant person and an even more briliant Time Lord. This will obvioulsy leave us to other questions as well, as Who is going to be next Doctor? Certainly something to think about.
The new season will air in the 15th of April according to his interview that I can't wait to see and at the same time... wish it could be later. Just don't want him to go... :/ _\\//