Yeah, it actually comes with a giant helmet.
Regular copy of Halo 3: $59.99? (It’s a first-party game, will it be $49.99?).
Collector’s Edition of Halo 3: $69.99? Maybe a two-disc set of the game along the lines of the Halo 2 collector’s edition.
Legendary Edition of Halo 3: A four-disc set, featuring a video of cut-scenes from the Halo games with DVD-style director’s commentary, among other extras like documentaries and and a look at the way Halo fans have extended the fiction, in addition to the actual game. Oh, and there’s a cat-head sized SPARTAN helmet that you’ll put over the four discs as a display piece. How much will this all cost? No one has a clue.
Source: gametab.com