I had my suspicions that he was Gandalf (Particularly because many people kept mentioning it), but I was holding out on the hope that "The Stranger" was one of the blue wizards since one of the books in the legendarium mentioned that the blue wizards came in the 2nd age.

I am excited that he may be returning, but I do wonder how long Ian McKellen can continue playing Gandalf, as Ian McKellen is 85 years old. While he is the only Gandalf I can imagine, he is isn't getting any younger... Nonetheless, I am very excited.

I have quite a few theories that I have been throwing around in my head and I am glad that someone else also thinks it could be Qimir. There is also the possibility that it could be one of the (seemingly) murdered Jedi, or that it could be the Zabrack witch, Koril. There is also the unlikely possibility that it could be Sol. And finally, one goofy theory that I have is that because of the constant "the master this, the master that" from Mae, "the master" could be "The Master" from Doctor Who.

Cal, from Jedi: Fallen Order, also uses his lightsaber as a flashlight in several cave sequences... and if you played Fallen Order the same way I did, a lightsaber is an effective lawnmower.