Right, I thought the idea of Tesla, as a wizard of science among mere squabbling magicians, a fun plot notion. That they dealt with him, almost alone and in his secret keep, surrounded by the mysteries of his work, a wonderful spin on the mythos surrounding Tesla.
It helps that Tesla's personality was bit off in real life, and he did things that even today we think of as a kind of magic.
Of course in the movie what he built was impossible, but the notion that "any sufficiently advanced technology is indistinguishable from magic" kept creeping into my mind.