Do you think that Harrison is being guided by another villain more powerful like Bane and Talia in The Dark Knight Rises?
It is an interesting theory, because is hard Harrison does all of this without having an internal help.
How can he go to Kronos? How does he manage weapons, ships, confidential information only with his skills?
He would be a mixture of James Bond, Jason Bourne and Ethan Hunt.
Ages ago there was rumour of Cumberbatch's character having a mentor, although I have no idea whether it originated as supposed insider knowledge or just fan speculation.