Quem são os dois Istari mencionados em Shadow of Mordor?

Um dos artefatos encontrados em Middle Earth: Shadow of Mordor é um Broken Staff , acompanhado por esta memória:

Funny thing, that. They told us their names, plenty of times. But we all forgot. To a man, we forgot. It was like they didn't want us remembering. After a while, they were just the two Istari, and sometimes, the big one and the little one.

Can't say how I can't remember. I remember the bigger one telling us stories of a Goblin city, of a man who could turn himself into a bear, of the time when… well, I guess it didn't matter too much to him that some of his stories needed some cleaning up, or would scare a dead man out of his grave.

When the bigger one left, he took his cane. But he left a walking stick behind, with all these little notches cut into it. He was keeping track of something, for sure.

Eles são os Istari Azuis? Eles poderiam ser Gandalf e Radagast (a menos que esses dois fossem estabelecidos em outro lugar). A Sombra do Mordor Wiki sugere que estes são Blue Istari . O cânon tem alguma coisa a dizer? Tudo que lembro de Contos Inacabados é que eles foram para o leste.