Halo 4 will be getting a playlist update shortly that will add community creations from the Forge into a variety of multiplayer playlists in fortnight. 343 Industries Community Manager, Jessica Shea recently explained via Twitter.
When asked about new maps being added to specific modes, Shea said that 343 Industries is “tentatively planning on adding applicable maps in two weeks.” Some Halo 4 fans have been playing in the Community Forge Test playlist, and soon the best Halo 4 Forge maps will arrive on other playlists.
It will take a little while for the new maps to propogate to the public playlists, as 343 Industries will need to make sure these community created maps are up to par with the 343 created content. Look for the playlist updates in the coming weeks.