343 has confirmed that Halo: The Master Chief Collection will come with multiplayer maps that were previously exclusive to the Windows PC versions of Halo: Combat Evolved and Halo 2.
The formerly-exclusive maps will be available in both in both custom games and regular matchmaking.
You can read a variety of FAQs over on the Halo Waypoint.
Halo: The Master Chief Collection will be available from Xbox One on 11 November.
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