^Perhaps that is the reason for leaving out the names (and I admit that it is my own conjecture that arrived at my conclusion), but to me it seems they could have easily simply not even tried to allude to their names ("...and then there are the two blue wizards.") or could have easily secured the rights to use just those names. I like the thought that it was a bit of a joke because it made me laugh in the theater, but of course I could be wrong.

I'll also admit that my Tolkein knowledge is rather limited, as I only read the trilogy for the first time in the past year (and the Hobbit for the first time in more than a decade last October). Anything beyond that stems from my reading the LOTR wiki. You seem much more knowledgeable in all things Tolkeinesque, and maybe you should start a Middle Earth thread. I know I'd enjoy it, but I feel unworthy to start it ;)