OOC (Clarifications and Wonderful Neepery, Part the Third)
That post was meant more in jest than anything. If we actually see the Doctor, I expect nothing more than a cameo and a particularly long and intense conversation between the Doctor and Trav, and then them going their separate ways.
The rediscovery of Gallifrey and the Doctor's banishment of Rassilon would radically change some shit for Trav, but she'd still remain the same at the core. If this were to take place in Garyverse, she'd probably stop by Gallifrey *once*, to make one announcement, and then not come back for a long long time.
Oh, I've decided - Trav is a Shobogan. She and her family are from outside the Citaldel, and are farmers, like were portrayed when the soldiers came for the Doctor in Heaven Sent. That's the reason she doesn't talk in the received pronunciation - her Shobogan community talks and acts like North Americans, and rejects corrupt Citadel culture, but were desperately poor. Trav was sent to the Citadel because of her staggering brilliance when she was a child, passing all of the examinations easy and earning her way past other children with far greater pedigrees. This earned her family admittance to the Citadel and a much easier life. But she was placed in a dead end job as a celestiagropher, until her first adventure with The Doctor.