In my headcannon, the Ninth Doctor treats the War Doctor as a monster. But many presume him an imposter. Many think him a Nazi because of his peacoat and aggression, and the War one as one of the Allied Forces for his outfit and virtue. They’d also accuse the Ninth Doctor of gaslighting to trick them to kill each other. And some accuse him of being the Master. But the War Doctor defends him and gives him a second chance, proving better than the Ninth Doctor who breaks promises.

The War Doctor be the Doctor I wish to meet the MLP ones the most. It rock if he was the first one to meet Rainbow and Flurtershy as well as Sunset, the CMC, and Fizzlepop Berrytwist.