Ah, paul, I stand corrected, thank you.
If, as you say, some of the New testament books were in existence at that time, and i will, for the sake of discussion take your word for it, there was still no "official" canon at that time, so it could not be applied as meaning the canon of Nicea. If you can give me the passages from the books that compose the Bible which state the authority of any such council to determine what books are Holy, and which are heretical, I would like to see them.
It especially couldn't have meant the canon of Nicea because there is no such canon. Nicea had nothing to do with canonicity.