Halo 3 maps Citadel, Longshore, and Citadel release?

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I would like to know some facts about the three new "Mythic" Maps.
-how will they be released?
-With and only with ODST Collectors Edition or what ever.
-With all ODST Editions
-XBL Marketplace?
-What im asking is if I have to buy an edition of ODST to get the new Halo 3 maps or if they will even be released for Halo 3.
-Second I'd like to know if the 3 maps will be released on the XBL Marketplace and when.
- and when they will be released what maps will I get?
-Its technically part of the Mythic Maps so will I have to buy all 6 maps again?
- I have heard that with ODST it will release all maps from halo 3 even the DLC maps.
Any info about how the three new maps will be released and when on the marketplace will be very appreciated! Thx!

 

[Nathan]

it comes with any odst they may be on market place but i think you have to buy 'em

p.s. you said cidadel twice.