Hobbit Characters, Possible or Probable?

This topic on TheOneRing.Net really caught my attention today. Apparently, it's from a reliable source. The subject in question is a link which gives a list of characters that might be major roles in The Hobbit.

What do you think of the list?

I was, shall we say, surprised/alarmed/slightly freaked out to see "additional" characters on the list, particularly Itaril and the Elf Warrior, the former of whom would certainly be a made-up character. Frankly, the idea of adding (or deleting, for that matter) major characters to any book wrote by Tolkien, who wrote books with lots of detail, just doesn't seem right to me. Secondly, adding a romantic subplot to The Hobbit movie would be more like filming a fanfiction, instead of the original book. Fanfiction is fine, but to add those kind of elements to The Hobbit movie--the hugely anticipated prequel to the hugely successful LOTR saga--doesn't seem right, either.

On the other hand, I doubt whether this list is official, and I rather expect we'll hear in day or two that it's not. If it is real, then I suppose I can at least be happy that the Master of Laketown will likely be in it, that Richard Armitage has a good chance of playing Bard, and that Smaug is going to be a "he" and not a "she". Also, I do like the idea of including Frodo's parents; Frodo's childhood/parents didn't get any mention in the theatrical cut of LOTR, and even in EE, there wasn't much.

So, again, what do you think? :)